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Open Roads Forum  >  Fifth-Wheels

 > Humming noise with hot water use

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DickandVicki

Canton, OH

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Posted: 10/27/11 11:44am Link  |  Print  |  Notify Moderator

We have a '07 Keystone Cougar 292RKS 5th wheel with a Suburban water heater. We just pulled our rig from OH to FL to spend the winter. For lack of a better term, we have a "hum" in the water heater and hot water lines whenever we open a hot water faucet (whether the water is heated or not). I thought it might be a lack of an air gap, so I just went through the air gap replacement proceedure (twice) with no change. Any of you ever encounter this problem? Thanks!


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downtheroad

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Posted: 10/27/11 11:48am Link  |  Print  |  Notify Moderator

Assuming it's not the pump...my guess is that the check valve in the water heater is sticking or beginning to fail.


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greende

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Posted: 10/27/11 12:14pm Link  |  Print  |  Notify Moderator

Sounds like a check valve either in the water heater or the city water inlet if you are hooked up to city water.


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skylos

Columbus, OH

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Posted: 10/27/11 12:39pm Link  |  Print  |  Notify Moderator

sounds like a check valve, yes.

DickandVicki

Canton, OH

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Posted: 12/28/11 11:34am Link  |  Print  |  Notify Moderator

A few weeks ago I finally went and bought a check valve to replace the old one. It really was a straightforward job - but it definitely took a deep dish socket and breaker bar to break the old one loose. That solved my problem, so...on to the next one, whatever it might be.

larry barnhart

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Posted: 12/28/11 11:52am Link  |  Print  |  Notify Moderator

I gutted our check valve 4 years ago but will replace it if we ever winterize. this would be bad news for us because it would mean we are staying home for the winter.
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Old-Biscuit

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Posted: 10/27/11 02:09pm Link  |  Print  |  Notify Moderator

Only happens when using hot.....doesn't happen on cold?

Water heater check valve sticking......look at water lines on heater for a cylinder looking fitting (can be on bottom-cold inlet or on top-hot outlet).

Can remove/knock internals out and put back on.............just remember to replace when you go to 'winterize' rig.

tx racer 67

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Posted: 10/28/11 10:59pm Link  |  Print  |  Notify Moderator

Mine sounds the same,will check the valve.


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Mike_LA

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Posted: 10/29/11 07:18am Link  |  Print  |  Notify Moderator

Noisy water heater thread


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