Lack of hot water

Old Biscuit is correct, it is a GEH16EXT model and, looking at some schematics, it has a mixing valve which is probably the problem. Unfortunately the back side of the heater is very difficult to get to. It may be necessary to remove the heater to get to the valve. I am going to let some experts spend their time and my money this next week. Thanks to responders.

WHY do people NEVER respond with the Model numbers or other critical info when asked. They WASTE time posting responses but NEVER post the model number. Doug

dougrainer wrote:

racerchaser wrote:
Thanks to those who have replied. Should have stated that the outside shower and bypass valves have been checked. Also, the coach has never been winterized. We follow the birds south. If there is a check valve on the downstream side of the tank I am going to let a professional work on it as the tank is difficult to access.

Give us the model number. Doug

Quick check at Winnebago......2008 Itasca Horizon uses an Atwood XT WH

So no check valve
BUT being an XT model 'mixing valve' is your problem -----it is clogged

*You can remove and soak in CLR, hot vinegar etc. to try and dissolve calcium/minerals clogging it up.
*Replace with new OEM ----roughly $160 (plus labor if not DIY)
*Shop for another mixing valve at Lowes, Home Depot, plumbing supply (OEM is set for 130*F output)

**OR remove---re-plumb so cold goes in bottom and hot comes out top with a bypass connecting cold/hot for winterizing (3 shutoff valves needed...cold, hot and bypass) and then change the T-stat on front of WH to a standard Atwood 140*F t-stat----would need to change brown wire connector to small female spade vs the 'pin' connector used on the XT Model 160*F t-stat

Until one of the above options is done-----no hot water will flow out of WH (unless banging on mixing valve with handle of screw driver frees it up--until it clogs again) :B

If the check valve is bad, you get no water flow (hot or cold) out of the hot water faucet. We need the model number of the water heater to assist you.

Happened to me a year ago --- was the Check Valve!

Replaced it and Bam - Hot water again

racerchaser wrote:
Thanks to those who have replied. Should have stated that the outside shower and bypass valves have been checked. Also, the coach has never been winterized. We follow the birds south. If there is a check valve on the downstream side of the tank I am going to let a professional work on it as the tank is difficult to access.

Give us the model number. Doug

Thanks to those who have replied. Should have stated that the outside shower and bypass valves have been checked. Also, the coach has never been winterized. We follow the birds south. If there is a check valve on the downstream side of the tank I am going to let a professional work on it as the tank is difficult to access.

Need MODEL number. If he has an XT model, the odds are the mixing valve is bad. Doug

Ivylog wrote:
Another vote for checking the outside shower valves and the bypass behind the unit if it was winterized.

Also check the water filter - this if filled can case similar symptoms with Hot Water.

Usually something simple.

BOL,

Another thing to check, which is a much less likely one to be the problem is... If you have a washing machine turn off the valves to it. If the water heats up, then the mixer valve within the washing machine went bad.