Hot water heater out of control

[rdjmm]

Jayco TT 2015 Our water heater has run a muck! It doesn't matter if it is on gas or electric, our water heater has scalding hot water com out of the faucet. Turned it off but it almost seems like it keeps running.I know that's impossible.
LOL. Any info would be a great help. Thanks

[Old-Biscuit]

dougrainer wrote:

rdjmm wrote:
Looked at thermostat and eco also the thermostat shut off. There scorched wires on both parts. Thanks for all your help everyone. We know you always have the answers or at least know where to point someone in the right direction. Thank you all.

You stated scorched wires. Are you not curious WHY you have scorched wires???? You have scorched wires because you had a flame blockage and the flame flashed back and burnt the wiring. You need to replace the burnt wiring and I would replace the tstat/ECO and the Thermal sensor. Doug

AND cleaan orifice (soak in alcohol.....no poking or blowing high compressed air thru it), clean the burner tube (small bottle brush) and swab out the combustion/exhaust chamber (run a wire thru, tie a rag to wire then pull it back thru...chimmney sweep)
As stated....you probably had a blowback (flame coming back out of combustion chamber) enough so to scorch the wires.
Thermal Cut Out (temp fuse) should have blown shutting down all DC and stopping any heating cycles......thermal cut out (clear tube) should be positioned above the burner so it can be exposed to blowback,

Replace the thermal fuse, replace the t-stat/ECO and any scorched/burnt wires

[dougrainer]

rdjmm wrote:
Looked at thermostat and eco also the thermostat shut off. There scorched wires on both parts. Thanks for all your help everyone. We know you always have the answers or at least know where to point someone in the right direction. Thank you all.

You stated scorched wires. Are you not curious WHY you have scorched wires???? You have scorched wires because you had a flame blockage and the flame flashed back and burnt the wiring. You need to replace the burnt wiring and I would replace the tstat/ECO and the Thermal sensor. Doug

[mchero]

That link I provided above should have everything you need. They also sell "tune-up" kits.
I just replaced the pressure/temp valve, ignitor and burner assembly. Cleanup the old parts and keep as a backup.

[rdjmm]

Looked at thermostat and eco also the thermostat shut off. There scorched wires on both parts. Thanks for all your help everyone. We know you always have the answers or at least know where to point someone in the right direction. Thank you all.

[mchero]

Thanks for the model number! No mixing valve on that model. I'd suggest you replace both the thermostat and ECO.
I suggest this site for parts;
PDXRVWHOLESALE.COM

[rdjmm]

Atwood GC6AA

[mchero]

Even better stuff if we are given a make/model.

[midnightsadie]

lot good stuff, if it was too hot I think the safety valve would pop off.and you would see water flowing to the ground. put a temp gauge in the hot water see just how hot ,hot is.

[Old-Biscuit]

IF an 'EXT' model -----uses Mixing valve on backside to control hot water out to 130*F *tank water heated to 160*F then mixed with cold water via mixing valve
Typically the hot out from tank clogs and you only get luke warm then cold

If a '4E' model ----gas & electric use same set of t-stats
Normal temp T-stat (Brown wires)....140*F
ECO (energy cut off/high temp t-stat) 180*F...triggers RED Fault Light and locks out any refiring until reset

IF normal t-stat is NOT tight against tank wall and tank surface/t-stat dirty then normal will not open until higher temp is reached but before ECO trips

Check the T-stat terminals/spade connectors tight/clean and that t-stat is beign held tight

[mchero]

Make and model of the HWH please!
If it's an Atwood G16-EXT it could be the mixing valve on the backside.

[enblethen]

Water coming out of the water heater is very hot normally. You then use the mixer valve to add cold water to make it useable and to allow a 6 or 10 gallon water heater to provide sufficient amount of heated water.

[naturist]

My guess, stuck thermostat. Or maybe bad control board. Possible also somebody fiddled with that thermostat. Dunno if that is possible. They used to be adjustable but might not be any more.