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stripedbass 12-20-2018 10:06 PM

New water heater only sending hot water for a short while
 
2 Attachment(s)
Two days ago I had a new water heater installed. It's an AO Smith.

However, I'm only getting hot water for a minute or so and then the water turns cold. Then after an hour and I turn on the hot water tap, the same thing happens. The hot water comes on then it turns cold after a minute.

The plumber cannot figure out what's wrong.

Below are some photos.

LawnGuyLandSparky 12-20-2018 10:32 PM

Re: New water heater only sending hot water for a short while
 
Smart money is bad dip tube.

stripedbass 12-20-2018 10:36 PM

Re: New water heater only sending hot water for a short while
 
LawnGuy,

We have confirmed that the hot and cold are not reversed on the water heater.

We have also run the hot water till it turned cold then went to the basement and touched the hot pipe to see whether it was hot or cold. The pipe was hot. If the pipe was cold this supposedly means that the heater's dip stick is broken which would cause the problem I'm having.

stripedbass 12-20-2018 10:53 PM

Re: New water heater only sending hot water for a short while
 
2 Attachment(s)
My previous water heater was really old. It was installed around 1967. This thing was amazing. The only reason I replaced it is that its shutoff began leaking and it looked too fragile to fix.

I'm attaching some photos.

AllanJ 12-21-2018 08:58 AM

Re: New water heater only sending hot water for a short while
 
Does this happen at any faucet? Something else to try if you have not fixed the problem yet. Run a test rather than a full shower. When the water turns cold, run down to the basement and feel the hot outlet pipe of the heater. This latter could rule out an antiscald assembly up in a shower valve (or sold separately) malfunctioning and mixing in too much cold water.

Also the washing machine hookup should be turned off at the wall when not in use, which will prevent short circuiting of hot and cold water and also all sinks and other showers should be turned off using their regular faucets and not a sprayer hose shutoff.

(OT)
Allcraft? 1967? The apartment I grew up in (in the 1950's in Cambridge, MA) had an Allcraft with a copper tank (which replaced what I think was an INCO nickel tank). Such a tank will last a very long time.

jmon 12-21-2018 09:00 AM

Re: New water heater only sending hot water for a short while
 
Quote:

Originally Posted by stripedbass (Post 5715903)
Two days ago I had a new water heater installed. It's an AO Smith.

However, I'm only getting hot water for a minute or so and then the water turns cold. Then after an hour and I turn on the hot water tap, the same thing happens. The hot water comes on then it turns cold after a minute.

The plumber cannot figure out what's wrong.

Below are some photos.


Although rare, sometimes you can get one dead on arrival for some reason. It's a brand new install, if it doesn't work properly, the plumber should replace it with another one. Just my opinion.

stripedbass 12-21-2018 09:46 AM

Re: New water heater only sending hot water for a short while
 
Unlike the past 3 days, today I did not get hot water for even a minute. The water is just cold.

stripedbass 12-21-2018 09:50 AM

Re: New water heater only sending hot water for a short while
 
Hi Allan,

I had already tried this test. The hot pipe was hot when the water turned cold (someone had suggested the test to me). But thanks for trying to help me!

Quote:

Originally Posted by AllanJ (Post 5716081)
Run a test rather than a full shower. When the water turns cold, run down to the basement and feel the hot outlet pipe of the heater. This latter could rule out an antiscald assembly up in a shower valve (or sold separately) malfunctioning and mixing in too much cold water.


MTN REMODEL LLC 12-21-2018 09:56 AM

Re: New water heater only sending hot water for a short while
 
Obviously , you do not have any hot recirculating system involved.... or I'm sure you would have mentioned that.

Does this happen at other faucets through out the home.????

Maybe a strange coincidence with a bad shower anti-scald... I don't really know how they work... but perhaps the new water heater is set to deliver a higher temp than the old, and when it hits your anti-scald shower valve, that shower valve is acting strangly.

Bud9051 12-21-2018 10:13 AM

Re: New water heater only sending hot water for a short while
 
Maybe I missed it, but Allan asked "Does this happen at any faucet?" Is this just a problem at the shower?

If it is happening at all faucets then (as suggested) look for an anti scald device that can mix cold water into the hot.

I assume no other plumbing changes were made when water heater was installed?

Bud

Ghostmaker 12-21-2018 06:31 PM

Re: New water heater only sending hot water for a short while
 
Do you have single handle moen faucets? A bad O ring on the cartrige will allow pulling cold water into the hot water.

stripedbass 12-22-2018 12:46 PM

Re: New water heater only sending hot water for a short while
 
2 Attachment(s)
Hi Allan,

To your other points:

1) Yes, the problem with not getting steady hot water happens with all my faucets. I only have 2 faucets at the moment (kitchen and shower). My bath sink is disconnected at the moment (I need to install a new undermount sink bowl). I'm attaching photos of my faucets in case they are a factor.

2) My washing machine is always turned off when I'm not using it. And it does not have a switch on the wall. The only power switch is on the washing machine itself.

3) Yes, those Allcrafts are real beauties. :smile:

I'm in a 12-unit condo building. When I bought my condo in 2004, the home inspector told me that my Allcraft could last a week or another 10 years. The only reason I replaced it is because its shutoff was leaking and it seemed too fragile to fix. Now I'm kind of regretting it. We could have just turned the building's main shutoff off and replaced the water heater's shutoff. On well...

Quote:

Originally Posted by AllanJ (Post 5716081)
Does this happen at any faucet?......

Also the washing machine hookup should be turned off at the wall when not in use, which will prevent short circuiting of hot and cold water and also all sinks and other showers should be turned off using their regular faucets and not a sprayer hose shutoff.

(OT)
Allcraft? 1967? The apartment I grew up in (in the 1950's in Cambridge, MA) had an Allcraft with a copper tank (which replaced what I think was an INCO nickel tank). Such a tank will last a very long time.


stripedbass 12-22-2018 12:49 PM

Re: New water heater only sending hot water for a short while
 
Today I'm getting hot water which seems to last a bit longer before it runs out the cold comes in.

The plumber has not been able to swing by place. Says he's really busy but will try his best.

Quote:

Originally Posted by stripedbass (Post 5716159)
Unlike the past 3 days, today I did not get hot water for even a minute. The water is just cold.


stripedbass 12-22-2018 12:51 PM

Re: New water heater only sending hot water for a short while
 
jmon,

We'll see what happens. I hope the plumber, if he cannot fix the problem, will do the right thing.

Quote:

Originally Posted by jmon (Post 5716083)
Although rare, sometimes you can get one dead on arrival for some reason. It's a brand new install, if it doesn't work properly, the plumber should replace it with another one. Just my opinion.


stripedbass 12-22-2018 12:54 PM

Re: New water heater only sending hot water for a short while
 
MTN,

I don't think I have a hot recirculating system. I hope my faucet photos give you an idea of what I have.

Quote:

Originally Posted by MTN REMODEL LLC (Post 5716171)
Obviously , you do not have any hot recirculating system involved.... or I'm sure you would have mentioned that.

Does this happen at other faucets through out the home.????

Maybe a strange coincidence with a bad shower anti-scald... I don't really know how they work... but perhaps the new water heater is set to deliver a higher temp than the old, and when it hits your anti-scald shower valve, that shower valve is acting strangly.


stripedbass 12-22-2018 01:08 PM

Re: New water heater only sending hot water for a short while
 
2 Attachment(s)
Hi Bud,

I know that my kitchen faucet is a Moen. I'm not sure what brand is my shower faucet.

Are you suggesting I get an anti scald device or that I look to see whether I have one?

The only plumbing change that was made was the installation of a new shutoff to the water heater (in addition to replacing the one right above the water heater). We had to do this because the shutoff right above the heater did not shut off the hot water. It only shut off the cold water). This is why we had to shut off the building's main shutoff. But now with this secondary shutoff I do not have to shutoff the building's main shutoff. I'm attaching two photos below. I don't know whether they'll be clear enough for you to see. I think I'll have to take better photos of the shutoffs and post them.

Quote:

Originally Posted by Bud9051 (Post 5716185)
Maybe I missed it, but Allan asked "Does this happen at any faucet?" Is this just a problem at the shower?

If it is happening at all faucets then (as suggested) look for an anti scald device that can mix cold water into the hot.

I assume no other plumbing changes were made when water heater was installed?

Bud


rjniles 12-22-2018 02:36 PM

Re: New water heater only sending hot water for a short while
 
Your bath sink is disconnected, how is it disconnected. Show us a picture.

Bud9051 12-22-2018 03:07 PM

Re: New water heater only sending hot water for a short while
 
Not suggesting you need an anti-scald but trying to determine if you have one. Not a plumber so going to watch from the sidelines.

Bud

AllanJ 12-22-2018 03:13 PM

Re: New water heater only sending hot water for a short while
 
Shower anti-scald devices are usually part of the shower valve (and inside the wall behind).

Finding the hot pipe from the water heater still very hot after the water turned cold at the faucet tells me the water heater is not at fault.

You might have sediment or foreign matter floating around in the hot water pipes that may rise up to the shower valve or faucet being used and block the hot flow shortly after the faucet is turned on.

The only way I can think of for getting rid of this in a shower or bathtub is: Turn off the main water valve for the house. Disassemble the faucet or valve, removing the stem or cartridge. Cover the drain. Close the shower curtain. Go back downstairs and turn on the water a little. Go up and observe the flow. Go up and down to open the main valve a little more and check upstairs to get a good flow but not enough to push the shower curtain aside and get all over the floor. Let it run at a good clip for a few minutes. Then turn off the water and go up to see if the sediment came out. Re-assemble the faucets/valve.

stripedbass 12-22-2018 03:16 PM

Re: New water heater only sending hot water for a short while
 
1 Attachment(s)
Hi rj,

Attached below is a photo that shows how my bath sink is disconnected.

Please let me know if you need further information.

Thanks for trying to help me!

Quote:

Originally Posted by rjniles (Post 5717257)
Your bath sink is disconnected, how is it disconnected. Show us a picture.


COLDIRON 12-22-2018 06:03 PM

Re: New water heater only sending hot water for a short while
 
Reference to post #13. He's to busy to come by? You call him and tell him to get his ass back ASAP to find and fix or replace the water heater. 2 days old he's ridiculous.

stripedbass 12-23-2018 12:34 PM

Re: New water heater only sending hot water for a short while
 
Allan,

I really appreciate your feedback.

The only problem is that the old water heater did not have this problem. If the problem may be what you're describing, wouldn't the previous heater have had the same problem? In fact, with the old heater, I did not turn the kitchen sink and shower faucet all the way for I could scald myself (and the heat temperature knob on the old heater was always at a conservative setting! I never had it on a high setting).

Quote:

Originally Posted by AllanJ (Post 5717293)
Shower anti-scald devices are usually part of the shower valve (and inside the wall behind).

Finding the hot pipe from the water heater still very hot after the water turned cold at the faucet tells me the water heater is not at fault.

You might have sediment or foreign matter floating around in the hot water pipes that may rise up to the shower valve or faucet being used and block the hot flow shortly after the faucet is turned on.

The only way I can think of for getting rid of this in a shower or bathtub is: Turn off the main water valve for the house. Disassemble the faucet or valve, removing the stem or cartridge. Cover the drain. Close the shower curtain. Go back downstairs and turn on the water a little. Go up and observe the flow. Go up and down to open the main valve a little more and check upstairs to get a good flow but not enough to push the shower curtain aside and get all over the floor. Let it run at a good clip for a few minutes. Then turn off the water and go up to see if the sediment came out. Re-assemble the faucets/valve.


Akpsdvan 12-23-2018 12:58 PM

Re: New water heater only sending hot water for a short while
 
Has the dip tube been checked?


Some times the most simplest of answers is the answer.

stripedbass 12-23-2018 02:04 PM

Re: New water heater only sending hot water for a short while
 
Hi Akpsdvan,

I turned the hot water on in the kitchen sink then went to the basement. The pipe on my water heater with the red ring was hot. Someone told me that if the pipe was cold then the dip tube would be the problem.

Quote:

Originally Posted by Akpsdvan (Post 5718001)
Has the dip tube been checked?


Some times the most simplest of answers is the answer.


Akpsdvan 12-23-2018 02:35 PM

Re: New water heater only sending hot water for a short while
 
Have you removed the nipple and checked in the tank to make sure that it is there?


Even a new tank and have a challenge with the dip tube.


Eyes on is very often the best way to make sure some thing is correct.

Colbyt 12-23-2018 03:40 PM

Re: New water heater only sending hot water for a short while
 
If the man paid a plumber to install the d thing it is not his job to check anything.


And if I had no hot water by now I would sure be filing a complaint with the BBB.

stripedbass 12-23-2018 08:33 PM

Re: New water heater only sending hot water for a short while
 
Akpsdvan,

Thanks for the suggestion!

I have to say that I don't think the plumber removed the nipple to check the tank and see whether the tube is there. As far as I know he just touched the hot water pipe.

Can the pipe be hot even if the dip tube is missing or broken?

Quote:

Originally Posted by Akpsdvan (Post 5718057)
Have you removed the nipple and checked in the tank to make sure that it is there?


Even a new tank and have a challenge with the dip tube.


Eyes on is very often the best way to make sure some thing is correct.


LawnGuyLandSparky 12-23-2018 08:59 PM

Re: New water heater only sending hot water for a short while
 
Turn the water heater water supply valve off. Turn on kitchen faucet to hot. What happens?

LawnGuyLandSparky 12-23-2018 09:03 PM

Re: New water heater only sending hot water for a short while
 
Quote:

Originally Posted by stripedbass (Post 5718343)

Can the pipe be hot even if the dip tube is missing or broken?


Yes. At idle, the heat from the tank will convectively heat the pipe above it. In fact, if you haven't run the tap for a while, even the cold water pipe feeding the water heater will become hot.

hkstroud 12-23-2018 10:58 PM

Re: New water heater only sending hot water for a short while
 
Let's see if I understand all you have said. You have a kitchen faucet (a single handle Moen), a lavatory faucet (which is disconnected) a shower valve and a clothes washer.
You have said that when you are using hot water from either the kitchen faucet or shower and the water turned cold you have gone down to the water heater and the hot water output pipe is hot. That certainly indicates that the water coming out the faucet is not coming from the water heater. Suggest that you turn off the stop valve on the cold water input pipe to the water heater. Then you will know that any water coming out of the hot water side of a valve is coming from cold water side. You then only have to determine where. We know it can't be the bath lavatory faucet because it is physically disconnected. I have never heard of a cross over in a Moen valve but I suppose it could happen if the valve is open. Just not possible if the valve is closed. To eliminate any possibility however, close the hot water stop valve under your kitchen sink. It was suggested that it could possible be the washer and you said that it was unplugged. I suggest that you close the hot and cold water stop valves to the washer. That would eliminate any possibility of it being the washer mixing valve.

That only leaves the anti-scald valve in the shower if your shower valve has an anti-scald valve.



Given all that you have said that you have done so far, I have a question.

You said that this is a 12 unit condominium and that your water heater is in the basement. Do you have your own private basement? My question is where is the water heaters for the other units.

SPS-1 12-24-2018 07:58 AM

Re: New water heater only sending hot water for a short while
 
Quote:

Originally Posted by LawnGuyLandSparky (Post 5715921)
Smart money is bad dip tube.



You would think that even an amateur plumber - that would be the first thing he checks.

ShaneFromAZ 12-26-2018 11:16 AM

Re: New water heater only sending hot water for a short while
 
Have you ruled out any sort of sub terrain slab leak? If you had a hot water slab leak, you would hear your hot water tank always being filled up with cold water so that it could never get hot, meanwhile the hot water would be leaking out underground somewhere. This could account for the water never being hot.

SeniorSitizen 12-26-2018 12:02 PM

Re: New water heater only sending hot water for a short while
 
Quote:

Originally Posted by stripedbass (Post 5715925)
LawnGuy,

We have confirmed that the hot and cold are not reversed on the water heater.

We have also run the hot water till it turned cold then went to the basement and touched the hot pipe to see whether it was hot or cold. The pipe was hot. If the pipe was cold this supposedly means that the heater's dip stick is broken which would cause the problem I'm having.

Do this test by touching and holding both hot and cold pipes while a second person runs maybe a gallon or two of hot water from the sink up stairs. If the hot pipe turns cold then hot again in about a minute or less, as mentioned previously several times, there is a real chance there is no dip tube delivering the cold water to the bottom of the tank where it belongs.

ront02769 12-26-2018 12:44 PM

Re: New water heater only sending hot water for a short while
 
Not a plumber.....but looks like a gas heater so......gas connected correctly? Valve all the way to “on” position? Temp set correctly and not on “vacation” or the like? Main burner coming on when hot water is run? Unlikely that putting in the new heater would cause problems in both the shower and sink.....much more likely a problem with the heater. Will be interested in seeing eventual solution. Ron

Voxman 12-26-2018 02:52 PM

Re: New water heater only sending hot water for a short while
 
I concur with ront02769 advice. Its gas...check to see when gas flame comes on and what the setting is. More importantly, the plumber should have been back to correct this...inexcusable behavior.
If dip tube is broken or missing, then this would be the symptom. I cannot think of anything else causing the problem other than what was mentioned here (improper thermostat setting; defective thermostat; dip tube missing/broken). Again its not your responsibility to figure out and fix....get Mr. Plumber back.
Good luck !
Gary

stripedbass 12-26-2018 04:32 PM

Re: New water heater only sending hot water for a short while
 
2 Attachment(s)
Hi hkstroud,

Thanks for the feedback.

I do not have my own private basement. Our condo building is one big structure. It has 4 columns. Each column has 3 floors (one condo unit per floor). Each column has its own basement.

On one end of my column's basement is my water heater. On the other end of the basement are the water heaters for my two neighbors in my column.

However, my water heater is next to the boilers of my two neighbors. I do not have a boiler because I'm on the top floor. All the top floor units have heaters that don't require a boiler. For example, I have a direct vent heater.

Below are some photos that might help you visualize what I'm trying to explain. The first photo on the left is of my water heater which is adjacent my neighbors' boilers. The photo on the right is of my neighbors' water heaters (on the other end of the basement).

Quote:

Originally Posted by hkstroud (Post 5718409)
You said that this is a 12 unit condominium and that your water heater is in the basement. Do you have your own private basement? My question is where is the water heaters for the other units.


LawnGuyLandSparky 12-26-2018 07:32 PM

Re: New water heater only sending hot water for a short while
 
Turn the water heater water supply valve off. Turn on kitchen faucet to hot. What happens?

stripedbass 12-26-2018 08:45 PM

Re: New water heater only sending hot water for a short while
 
2 Attachment(s)
LawnGuy,

I have 2 shutoffs for my water heater. One is near the cold water pipe. The other is a little away from the heater. The plumber installed the latter because the shutoff for my condo unit in the basement does not work completely. It shuts the cold water off but not the hot water.

This is a separate plumbing issue. We had water shutoffs installed in each of the 4 basements in the building like 4 years ago. The idea was to avoid having to shut off the building's main shutoff whenever someone had to get some plumbing work done. Well, the shutoff in my basement shuts off the cold water but not the hot water. The plumber who installed the shutoffs for the whole building (different from the one who installed my water heater) must have missed something. We did not test his work when he completed the work so we only caught the problem later.

The photo on the left below is of the shutoff that the plumber installed for the hot water (the shutoff is green). The photo on the right, though it's quite dark, is supposed to show the cold water shutoff which is above the black knob (it's green like the other one). It too was installed by the same plumber because the previous one was very old, was the round kind and had began to leak.

In fact, it was because of the shutoff leak that I decided to replace my old water heater. The heater itself was working fine but very, very old. You probably cannot see the photo on the right clearly. It's funny, on my cell phone the photo is clear but when I transferred it to the computer it got really dark. Maybe your computer screen is clearer and I need to adjust my computer screen somehow.

So if I was to do you test, would I need to shut off both shutoffs for my water heater?

Quote:

Originally Posted by LawnGuyLandSparky (Post 5720275)
Turn the water heater water supply valve off. Turn on kitchen faucet to hot. What happens?


SeniorSitizen 12-26-2018 09:09 PM

Re: New water heater only sending hot water for a short while
 
[QUOTE=stripedbass

So if I was to do you test, would I need to shut off both shutoffs for my water heater?[/QUOTE]
I have no clue what this will accomplish, BUT, before closing both valves to a water heater I'd dam sure shut the fire off first, including the standing pilot if it has one.

rjniles 12-26-2018 09:27 PM

Re: New water heater only sending hot water for a short while
 
He is trying to determine you are looking at the right WH. No need to turn off burner or pilot light for a short test.

Sent from my RCT6213W22 using Tapatalk

AllanJ 12-26-2018 09:29 PM

Re: New water heater only sending hot water for a short while
 
To do the last test turn off just one shutoff valve, the one just before the cold inlet to the water heater or the one in the hot outlet from the water heater.

Regarding the separate plumbing issue where the plumber put in a shutoff valve for your apartment that did not shut off the hot water, that is a very minor issue. His work was enough to avoid turning off the master cold water shutoff if work needed to be done in one of the other apartments or needed to be done in the cold plumbing of your apartment.

stripedbass 12-26-2018 11:02 PM

Re: New water heater only sending hot water for a short while
 
Hi Allan,

On second thoughts, maybe I shouldn't do this test. Let me explain: So far I've avoided doing anything that involves altering the water heater in any way. The reason for this is that I do not want the plumber to have an excuse that I did something to the heater which is why it's not working.

Quote:

Originally Posted by AllanJ (Post 5720411)
To do the last test turn off just one shutoff valve, the one just before the cold inlet to the water heater or the one in the hot outlet from the water heater.

Regarding the separate plumbing issue where the plumber put in a shutoff valve for your apartment that did not shut off the hot water, that is a very minor issue. His work was enough to avoid turning off the master cold water shutoff if work needed to be done in one of the other apartments or needed to be done in the cold plumbing of your apartment.


ront02769 12-26-2018 11:09 PM

Re: New water heater only sending hot water for a short while
 
It IS the water heater....somehow. So did you run the water and see if the burner fires off??? And with that said, this is TOTALLY on the plumber......unless yuo did the ill buy the unit and yuo install it deal......in which case you have a bigger issue.

stripedbass 12-27-2018 01:37 AM

Re: New water heater only sending hot water for a short while
 
I did not buy anything. The plumber bought the heater and installed it himself. He also took away my old heater.

Quote:

Originally Posted by ront02769 (Post 5720499)
It IS the water heater....somehow. So did you run the water and see if the burner fires off??? And with that said, this is TOTALLY on the plumber......unless yuo did the ill buy the unit and yuo install it deal......in which case you have a bigger issue.


hkstroud 12-27-2018 11:43 AM

Re: New water heater only sending hot water for a short while
 
If you have cold water coming out the hot side of your kitchen faucet you have cold water coming into the hot water side from the cold side. The question is where?

One place that could happen is at the mixing valve of the clothes washing machine. My suggestion is that you close the valves at your washing machine. That will prevent that from happening if the mixing valve is defective.
If after closing the washer valves, you still get cold water out the hot side of the kitchen faucet, close cold water input valve on the water heater. You should no longer get ANY water out the hot side of the faucet. If you do then someone has done something between your water heater and you.

COLDIRON 12-27-2018 01:23 PM

Re: New water heater only sending hot water for a short while
 
Please when the problem is discovered and fixed. Don't forget to tell us what was found. I think most people following this would like to hear the ending to this story.

LawnGuyLandSparky 12-27-2018 02:10 PM

Re: New water heater only sending hot water for a short while
 
Quote:

Originally Posted by stripedbass (Post 5720341)
LawnGuy,

I have 2 shutoffs for my water heater. One is near the cold water pipe. The other is a little away from the heater. The plumber installed the latter because the shutoff for my condo unit in the basement does not work completely. It shuts the cold water off but not the hot water.

This is a separate plumbing issue. We had water shutoffs installed in each of the 4 basements in the building like 4 years ago. The idea was to avoid having to shut off the building's main shutoff whenever someone had to get some plumbing work done. Well, the shutoff in my basement shuts off the cold water but not the hot water. The plumber who installed the shutoffs for the whole building (different from the one who installed my water heater) must have missed something. We did not test his work when he completed the work so we only caught the problem later.

The photo on the left below is of the shutoff that the plumber installed for the hot water (the shutoff is green). The photo on the right, though it's quite dark, is supposed to show the cold water shutoff which is above the black knob (it's green like the other one). It too was installed by the same plumber because the previous one was very old, was the round kind and had began to leak.

In fact, it was because of the shutoff leak that I decided to replace my old water heater. The heater itself was working fine but very, very old. You probably cannot see the photo on the right clearly. It's funny, on my cell phone the photo is clear but when I transferred it to the computer it got really dark. Maybe your computer screen is clearer and I need to adjust my computer screen somehow.

So if I was to do you test, would I need to shut off both shutoffs for my water heater?


The test requires you shutoff the COLD water valve that supplies the water heater. Then turn on the hot kitchen tap. If you get a steady never ending flow of cold water, it indicates that somehow cold water is piped into your hot water supply line, or as suggested the washer mixing valve is allowing cold water to crossover into the hot and backfeeding your plumbing.


If you get no water it means your water isn't going cold because of a pipe mix-up or mixing valve, but the WH is actually passing cold water which is most likely due to a broken or missing dip tube.



The test also eliminates the possibility that the water heater in question isn't actually yours. Stranger things have happened.



Quote:

On second thoughts, maybe I shouldn't do this test. Let me explain: So far I've avoided doing anything that involves altering the water heater in any way. The reason for this is that I do not want the plumber to have an excuse that I did something to the heater which is why it's not working.

I can't understand why you think the plumber would think you're shutting off the supply to your water heater could damage it. If that is your stance there is really nothing anybody can do to help you diagnose the problem.

stripedbass 12-27-2018 05:00 PM

Re: New water heater only sending hot water for a short while
 
The latest:

The plumber has not been able to swing by. Today I texted him. Then I left a message in his voice mail.

He texted me back. He's on vacation in Maine and won't get back till Jan. 2nd..

He doesn't really know what the problem is. He said not to worry and that the problem will be resolved. He also stated that he will pull a permit. I don't know what this means since he had never spoken of pulling a permit before.

He also said that I should try to turn the little black knob which controls the water temperature on the water heater. The idea is to increase the water temperature a bit and see what happens then text him. He cautioned that I don't want anything more than 130. I have not yet done anything with the knob.

He also said that he might want to get access to my neighbor's condo unit since my neighbor and I have connected plumbing. He said he thinks my neighbor may be causing the problem but did not explain.

In all honesty, I'm confused and beginning to get a bit anxious. Keep in mind that I've already paid this plumber $1650.00.

COLDIRON 12-27-2018 07:48 PM

Re: New water heater only sending hot water for a short while
 
Quote:

Originally Posted by stripedbass (Post 5721193)
The latest:

The plumber has not been able to swing by. Today I texted him. Then I left a message in his voice mail.

He texted me back. He's on vacation in Maine and won't get back till Jan. 2nd..

He doesn't really know what the problem is. He said not to worry and that the problem will be resolved. He also stated that he will pull a permit. I don't know what this means since he had never spoken of pulling a permit before.

He also said that I should try to turn the little black knob which controls the water temperature on the water heater. The idea is to increase the water temperature a bit and see what happens then text him. He cautioned that I don't want anything more than 130. I have not yet done anything with the knob.

He also said that he might want to get access to my neighbor's condo unit since my neighbor and I have connected plumbing. He said he thinks my neighbor may be causing the problem but did not explain.

In all honesty, I'm confused and beginning to get a bit anxious. Keep in mind that I've already paid this plumber $1650.00.

"I don't like the sound of this last post at all, I don't know your plumber and I don't like him either"

ront02769 12-27-2018 08:45 PM

Re: New water heater only sending hot water for a short while
 
Dear lord, turn up the “little black knob”.....like someone on this forum already told you to do.....and run the hot and see if the burner comes on. Plus, your plumber is crap. I would cancel my check.


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