hot water shuts down

[comanchecarpenter]

If we turn on the hot water (full on, hot water only) we hear a moaning sound and the hot water slows to a dribble then stops. The moaning sound seems to come from under the bathroom sink. We have a 2011 Bighorn, model 3670RL.

 

[cookie]

Welcome to the posting side of this great forum. Lots of great information here.
I have a couple of questions regarding your problem.
Does your hot water slow to a dribble on every faucet?
Is the cold water pressure good at the same faucets?
Has your rig been winterized? Check the bypass valves in the UDC and be sure that they are now in the "Normal" position.
Finally, there is a check valve on the water heater. It may have gone bad and needs replacing.
Please come back and let us know what is found.
Others may have more suggestions.

Peace
Dave

 

[comanchecarpenter]

It slows to a dribble at all faucets and the cold is no affected. We have not winterized the rig.

 

[danemayer]

If you operate the bypass valves for the water heater, cold water will be routed through the hot side of your faucets. If the water flow is restored, the flow problem is at the water heater and is likely caused by the check valve on the hot outlet.

If you need help replacing the check valve, take a look at page 14 of our owner-written Water Heater Troubleshooting Guide.