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Old 01-28-2011, 03:12 PM   #1
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Hot water problem - Figured out cause - Need advice how to fix!


Hi,
So we have had this hot water problem for the past year: running a hot tap anywhere in the apt stays hot for half a minute or so then goes cold. Turn off the tap for another minute, turn it back on, and the same thing. Hot water, then cold after 30 seconds or so.


After a bit of trouble shooting, I have figured out that when we have the washing machine on the START of a cycle (i.e. when the water is filling up in the machine) I can run the hot tap in the downstairs bathroom, and I believe any other hot tap, and it stays continuously hot. As soon as the machine cycle moves to the next stage (i.e. it stops filling up and rotates), the hot water from the tap runs cold instantly.


One other thing, if I put the washing machine on a COLD cycle, hot water comes out, and on a HOT cycle, cold water comes out.


OK, thanks for staying with me so far


So, I guess what I'm wondering is, what is the fix for this? Any advice much appreciated. We have a one year old and losing hot water so quickly is really tough in the winter.



Cheers so much.

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Old 01-28-2011, 03:25 PM   #2
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Hot water problem - Figured out cause - Need advice how to fix!


Sounds to me like a drunken want to be plumber piped it backwards. Hot on the right and cold on the left, not sure why that would effect the rest of the place though.

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Old 01-28-2011, 03:40 PM   #3
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Hot water problem - Figured out cause - Need advice how to fix!


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Originally Posted by Jackofall1 View Post
Sounds to me like a drunken want to be plumber piped it backwards. Hot on the right and cold on the left, not sure why that would effect the rest of the place though.
Well, hopefully if we get a new washing machine the new plumber can hook it up correctly! Unfortunately, we bought the apartment last year and inherited this particular problem (the hot water going cold so quickly).

Could that particular issue be caused by some sort of cross flow with the existing washing machine? Seems odd that we get continuous boiling hot water when the machine is on the initial wash cycle.
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Old 01-28-2011, 03:42 PM   #4
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Hot water problem - Figured out cause - Need advice how to fix!


Turn the valves off at the washer and see it makes any difference.
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Old 01-28-2011, 03:46 PM   #5
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Hot water problem - Figured out cause - Need advice how to fix!


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Originally Posted by Jackofall1 View Post
Turn the valves off at the washer and see it makes any difference.
Jacko, really daft question here, but how do I turn off the valves? Do I need to turn off the water supply to the apartment first? (learning this end!).

Also, if I turn them off and it fixes the hot water issue, what does that mean?

Cheers.

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Old 01-28-2011, 03:50 PM   #6
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Hot water problem - Figured out cause - Need advice how to fix!


Where the washing machine hoses connect, are there valves? (1) blue (1) red? if there is (and there should be) just turn those off.
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Old 01-28-2011, 03:51 PM   #7
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Hot water problem - Figured out cause - Need advice how to fix!


Once you have those closed, you could change the hoses on the washer to, switch them and the hot and cold cycles will work correctly.
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Old 01-28-2011, 03:51 PM   #8
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Originally Posted by Jackofall1 View Post
Where the washing machine hoses connect, are there valves? (1) blue (1) red? if there is (and there should be) just turn those off.
Alright. Unfortunately it is a machine/dryer combined unit wedged into a tight closet. I'll give it a go though.

If turning them off does fix the hot water issue, what would that mean in terms of the problem? Also, how could it be fixed?

Thanks so much.
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Old 01-28-2011, 03:54 PM   #9
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Hot water problem - Figured out cause - Need advice how to fix!


It could be that if you switch those hoses the problem will go away, give it a shot and see what happens.
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Old 01-28-2011, 03:54 PM   #10
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Quote:
One other thing, if I put the washing machine on a COLD cycle, hot water comes out, and on a HOT cycle, cold water comes out.
You mean the water in the washing machine? If so, check the hoses at the inlet valve on the back of the machine. Sounds like they are crossed.

Has anyone changed the inlet valve since you have had the machine? Maybe the wires are crossed sending the wrong signal.

Haha, I see Jack and I had the same thought.
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Old 01-28-2011, 03:59 PM   #11
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Hot water problem - Figured out cause - Need advice how to fix!


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Originally Posted by boman47k View Post
You mean the water in the washing machine? If so, check the hoses at the inlet valve on the back of the machine. Sounds like they are crossed.

Has anyone changed the inlet valve since you have had the machine? Maybe the wires are crossed sending the wrong signal.

Haha, I see Jack and I had the same thought.
Quote:
Originally Posted by boman47k View Post
You mean the water in the washing machine? If so, check the hoses at the inlet valve on the back of the machine. Sounds like they are crossed.

Has anyone changed the inlet valve since you have had the machine? Maybe the wires are crossed sending the wrong signal.
Hi boman,

Ha, yes, the washing machine water comes out switched around. I'll definitely try switching the hoses, but will that fix the main hot water problem (hot water turning cold in bathroom, kitchen etc.)?

Odd isn't it that when the washing machine has hot water coming out of it (when we have it on the cold wash setting), the hot water in all of the other faucets (bathroom, kitchen etc.) comes out consistently hot and the hot water going cold issue goes away.

If, however, I put the washing machine on the hot cycle (cold water coming out of the machine), the faucet hot water problem remains.
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Old 01-28-2011, 03:59 PM   #12
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Hot water problem - Figured out cause - Need advice how to fix!


Quote:
wrong signa
l

I guess I should have just said sending the signal to the wrong solenoid on the valve, if has the inlet valve I am thinking of.
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Old 01-28-2011, 04:06 PM   #13
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Hot water problem - Figured out cause - Need advice how to fix!


Quote:
Originally Posted by boman47k View Post
l

I guess I should have just said sending the signal to the wrong solenoid on the valve, if has the inlet valve I am thinking of.
Not sure if any work was done on it. We moved in a year ago and we have had the hot water going cold quickly problem ever since. Happy to have narrowed it down to the machine, but just wonder how it can be fixed if it does turn out that turning off the valves fixes the problem.

Any ideas?
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Old 01-28-2011, 04:09 PM   #14
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Hot water problem - Figured out cause - Need advice how to fix!


Heres my theory, when you open the hot water valve say in the bathroom, the pressure in the hot water piping drops, the cross connected washing machine allows the higher pressure cold water to flow into the lower pressure hot water piping.

When the washer is on the cold water pressure equalizes with the hot and presto its fixed.

Changing the lines will cancel the pressure differential.

Mark
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Old 01-28-2011, 04:13 PM   #15
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Hot water problem - Figured out cause - Need advice how to fix!


Quote:
Originally Posted by Jackofall1 View Post
Heres my theory, when you open the hot water valve say in the bathroom, the pressure in the hot water piping drops, the cross connected washing machine allows the higher pressure cold water to flow into the lower pressure hot water piping.

When the washer is on the cold water pressure equalizes with the hot and presto its fixed.

Changing the lines will cancel the pressure differential.

Mark
Thanks so much for the help fellas. I'll see if I can get the machine out and try swapping the hoses. Is swapping them over an easy thing to do?

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