Atwood water heater won't shut off.

You have a 10 gallon DSI propane water heater

It has 2 t-stats

Brown wire goes to normal t-stat (preset 140*F)

Red wire goes to ECO (high temp) t-stat (preset 180*F)

T&P Relief valve OPENS at 210*F/150 PSI


Weeping ......

Water swells when heated. If air pocket in top of tank (there by design) gets lost pressure can build up causing T&P to weep

Turn off water supply
Open faucet hot side to relieve pressure
Open T&P via lever....let snap close when water stops running out
Close faucet
Turn on water supply

Manual is here
http://bryantrv.com/docs2/docs/atwoodwaterheater.pdf

Old-Biscuit wrote:
You have a 10 gallon DSI propane water heater

It has 2 t-stats

Brown wire goes to normal t-stat (preset 140*F)

Red wire goes to ECO (high temp) t-stat (preset 180*F)

T&P Relief valve OPENS at 210*F/150 PSI


Weeping ......

Water swells when heated. If air pocket in top of tank (there by design) gets lost pressure can build up causing T&P to weep


Turn off water supply
Open faucet hot side to relieve pressure
Open T&P via lever....let snap close when water stops running out
Close faucet
Turn on water supply

Thanks. I've done all of that with no improvement. The water is steaming hot when the pressure relief starts weeping so I don't think there is a problem with that. Don't know what to try next.

I would guess the TT is not good or installed correct. The relief valve leaks because the water is hot and the reason for this relief valve. Air chamber as was posted above should help the problem. what else can the problem caused from?

chevman

You stated ....."have replaced gas valve and the thermostats with no difference"

Then you did not get t-stats tight against water heater tank wall.
I do not like Atwoods method of holding t-stats. Plastic washer pressing against a spring that has to be held compressed by three small tabs.

If tank wall is dirty where t-stats touch......t-stats won't sense temp (actually temp will go higher before t-stat opens
If t-stats are not tight.... same ----high temp before opening
If t-stats terminals/connectors not clean & tight....t-stats can open erratic

Turn water heater ON
When propane shuts off OR T&P Weeping hot water (it steams when it is released into atmosphere----doubt it is 210*F-----hot but not that high)
Collect a cup of full hot from faucet with thermometer in cup.......note highest temp reaches.

With that info...........easier to pin point issue

Post here or PM me with temps.

Thanks OB. I won't be at the trailer until this weekend so I'll get back to you.

You were right OB. I again tried the air pocket then lit the gas and let it go until the regulator started weeping. Checked the water temp and it was 155. I will replace the regulator next weekend and let you know if that fixes it. I am using an electric hot rod right now but our park frowns on using electric.??

heavyodie1 wrote:
You were right OB. I again tried the air pocket then lit the gas and let it go until the regulator started weeping. Checked the water temp and it was 155. I will replace the regulator next weekend and let you know if that fixes it. I am using an electric hot rod right now but our park frowns on using electric.??

I bet your park smiles when you pay the rent!

Had a hard time finding the 1/2" regulator but did get it replaced. Everything worked fine and water temp is 150 when it shuts off. Thanks everyone for the help.