Hot Water Starts Hot But Gets Cold Quickly. - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 12-07-2009, 03:31 PM   #1
Newbie
 
Join Date: Dec 2009
Location: Ephrata, PA
Posts: 5
Rewards Points: 10
Default

Hot water starts hot but gets cold quickly.


Hello all. This is my first post here. Recently the hot water in our shower started getting cooler and cooler. When we start out we have to mix the hot water with cold to get a nice temp but during the shower we have to reduce the cold water until it is completely off and the water still gets cooler.

What we have in the house is an old Columbia Co. Boiler that heats our house using a 3 stage baseboard system and it also heats our tap water. Heating the house seems fine but for some reason recently the tap water has not been staying hot.

Looking at the gauge in it's idle state (not using any hot water for a while and the furnace not firing up recently), the gauge reads 10PSI and the temp is at 160.

Last season we had our pump go out and had to replace it but from what I see, that is a totally different system. It looks like the tap water goes into the boiler cold and comes out hot. Looks like only 2 pipes for that system where there are a lot of pipes going in and out and splitting for the baseboard heating system and the pump is connected to those pipes and not the tap water system.

Any help would be great. If you need more info to help answer this question let me know and I will try to respond as good as I can.

Advertisement

CenterShock is offline   Reply With Quote
Old 12-07-2009, 03:44 PM   #2
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,530
Rewards Points: 4,698
Default

Hot water starts hot but gets cold quickly.


Sounds like the tankless coil is insulated with mineral build up.

It can be replaced. Or cleaned out. But cleaning it out involves a acid that could eat through the copper of the tankless coil.

Now would be a good time to consider either getting an electric water heater. Or an indirect hooked up to your boiler.

Advertisement

beenthere is online now   Reply With Quote
Old 12-07-2009, 03:57 PM   #3
Newbie
 
Join Date: Dec 2009
Location: Ephrata, PA
Posts: 5
Rewards Points: 10
Default

Hot water starts hot but gets cold quickly.


Quote:
Originally Posted by beenthere View Post
Now would be a good time to consider either getting an electric water heater. Or an indirect hooked up to your boiler.
My dad has been saying that for a while. Kinda broke right now but sounds like a good idea for tax return. Any suggestions to get me by for a couple of months?

Thanks for the reply neighbor! I just added info to my bio so you probably didn't know but I am in Ephrata, just a few miles from Lancaster.
CenterShock is offline   Reply With Quote
Old 12-07-2009, 04:26 PM   #4
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 2,000
Default

Hot water starts hot but gets cold quickly.


Measure your incoming water temp. A good shower temp is 90F to 110F, and 10 min @ 2.5 GPM is 25 gals.
Yoyizit is offline   Reply With Quote
Old 12-07-2009, 04:28 PM   #5
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,530
Rewards Points: 4,698
Default

Hot water starts hot but gets cold quickly.


No I didn't know that.

Not really anything you can do. other then having the coil cleaned. And cross your fingers it doesn't harm the coil.
Plus. Cleaning a coil like that is a time consuming job, so it can be expensive.
beenthere is online now   Reply With Quote
Old 12-07-2009, 10:38 PM   #6
Member
 
Join Date: Dec 2009
Location: levittown Pa
Posts: 62
Rewards Points: 75
Default

Hot water starts hot but gets cold quickly.


This sounds alot like the problem i am having and and when i moved into my house back in october the local oil company came out and cleaned the furnace i wonder if this could have casued this ? also i have a service agreement with my local oil company i wonder if this service is covered for the cleaning of the coils? i also mentioned my problem to them afterwards and they told me that it was my faucet is there any way i can push this back on them to prove that it is in faact my faucet?
typo is offline   Reply With Quote
Old 12-07-2009, 11:08 PM   #7
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,530
Rewards Points: 4,698
Default

Hot water starts hot but gets cold quickly.


Go to your kitchen faucet. Run hot only(for how ever long it would last in your shower). if it runs out, then its not your shower. If it doesn' then its your shower.

Most service contracts don't cover cleaning the coil. Its often refered to as "cooking out the coil".
Since the action of the acid causes it to heat up. as it eats the mineral build up.
beenthere is online now   Reply With Quote
Old 12-08-2009, 08:32 AM   #8
Member
 
Join Date: Dec 2009
Location: levittown Pa
Posts: 62
Rewards Points: 75
Default

Hot water starts hot but gets cold quickly.


then it must be my shower, i get 10 + minutes of boiling water coming from my kitchen faucet and bath room faucet. But the odd thing is it seems to be a problem with both of my shower faucets.

to add another note this morning the water was hot for half as long as normal and wasn't nearly as hot as previous days. the temp has droped here alot to the teens thru the night thou not sure if that has an effect on it.

Last edited by typo; 12-08-2009 at 09:30 AM. Reason: adding to post.
typo is offline   Reply With Quote
Old 12-08-2009, 11:02 AM   #9
Member
 
Join Date: Dec 2009
Location: levittown Pa
Posts: 62
Rewards Points: 75
Default

Hot water starts hot but gets cold quickly.


Could it be this valve this looks the same as what i have installed.

http://www.us.kohler.com/onlinecatal...sp?item=210402
typo is offline   Reply With Quote
Old 12-08-2009, 11:59 AM   #10
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,530
Rewards Points: 4,698
Default

Hot water starts hot but gets cold quickly.


Yes, its possible.

Run the shower. Open your access panel. Keep touching(lightly) the hot water line. If it stays hot while the shower water gets cooler and cooler. then its the valve(o-ring or seal bleeding through).

If it gets cold. Then your shower uses a lot more hot water then your kitchen sink and vanity do. And thats why they stayed hot the whole time.
beenthere is online now   Reply With Quote
Old 12-08-2009, 12:23 PM   #11
Member
 
Join Date: Dec 2009
Location: levittown Pa
Posts: 62
Rewards Points: 75
Default

Hot water starts hot but gets cold quickly.


I'll have to test that tonight and that should help me narrow it down..

Thanks for all your help.
typo is offline   Reply With Quote
Old 12-08-2009, 08:56 PM   #12
Member
 
Join Date: Dec 2009
Location: levittown Pa
Posts: 62
Rewards Points: 75
Default

Hot water starts hot but gets cold quickly.


The pipes aren't cooper pipes they are color coded and seem pvc like but a little softer. the pipes must be insulated they are really hard to get a temp by feeling them, well at least the hot even as it is steaming coming out of the faucet isnít heating the pipe enough to burn my hand. But i took out the balance valve and didnít see anything but I attempted to blow air thru the valves and the one side passed air thru freely and the other side had a ton of resistance. Does that mean the balance valve could be bad? The balance valve had air resistance on the hot side so i put it in the opposite way to see if it made a difference but it didnít. Should i go track down a local supplier of parts and attempt to replace that piece? i'd hate to put out 100 bucks for piece that wont resolve my issue.
typo is offline   Reply With Quote
Old 12-08-2009, 11:36 PM   #13
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,530
Rewards Points: 4,698
Default

Hot water starts hot but gets cold quickly.


When you ran your kitchen and bath faucets. Did you run them both at the same time.
if not, do so.
If you still have good hot water for 10 minutes like you were taking a shower(cheaper test then rebuilding a valve that isn't bad).
Then you probably need to rebuild your shower faucet.
beenthere is online now   Reply With Quote
Old 12-08-2009, 11:38 PM   #14
Member
 
Join Date: Nov 2008
Location: palm coast fl
Posts: 588
Rewards Points: 500
Default

Hot water starts hot but gets cold quickly.


just a thought if you read the warranty listed on the page you posted a link for it says lifetime warranty but it looks like its limited to leaks so call them and say both of your faucets are leaking and they will provide you with new cartriges. you may also try posting this in plumbing section if you havent already
kennzz05 is offline   Reply With Quote
Old 12-10-2009, 08:27 AM   #15
Member
 
Join Date: Dec 2009
Location: levittown Pa
Posts: 62
Rewards Points: 75
Default

Hot water starts hot but gets cold quickly.


i was unable to find the pressure valve locally so i called Kohler who is sending me the part and i should have it in 5 -7 days. so until then I'll keep my fingers crossed.

Advertisement

typo is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hot Water in Cold Water Lines ??? Superbuuck Plumbing 14 08-29-2011 01:21 PM
No Cold Water at all - both cold and hot pipes are burning to the touch bluecifer Plumbing 12 01-19-2009 11:29 AM
cold water runs hot phxhouser Plumbing 4 06-11-2008 10:03 PM
can't shut off cold water from main disconnect DanBress Plumbing 3 01-06-2008 07:20 PM




Top of Page | View New Posts