Water Heaters - Page 2 - Recent Questions, Troubleshooting & Support

The P8 fault can mean many things when it pops up on your Mitsubishi Electric wall controller. The P8 fault is activated when the indoor coil sensor does not change the temperature for a set amount of time after the compressor is (or should be) switched on.

Where does the tube sensor go

This one looks the same.https://www.ebay.ca/itm/133397559348They are made by Harper Wyman and using that model number, this is the result.https://www.google.com/search?q=Atwood+RV+oven+control+valve+57294But this shows more that looks similarhttps://www.google.com/search?q=Harper+Wyman+oven+control+valveAnd then if we go here and Zoom in, you will see MTZ 22300https://youngfartsrvparts.ca/products/used-atwood-wedgewood-oven-thermostat-57294Which leads us here and the Specs Sheet.https://www.copreci.com/en/gas-cooking/product-range/thermostats/with-safety-and-thermostatic-flow-regulation/372-mtz-22300-seriesand from there to here, and Parts Town stocks them!List Price: $ 318.24https://www.partstown.com/fagor-commercial/fgrc12008712..

red light means calling for heat check ignitor

Brian sounds like it's Leaking From Anode rod.... Check here.... https://lildutchuncle.com/rheem-water-heater-leaking/

call plumber to replace gas valve, it may cheaper replace water heater. gas valve is not DIY

Ideas in this link, but gas heaters need professional repair by a gas registered technician. https://www.google.com/search?q=Rinnai+Water+Heater.+It+is+not+heating ..

If you have a meter carefully check power to timer. If there and there is no power out of timer replace it.

There are some parts here for a different name branded NR-180A but doesn't seem to be much else https://www.tanklessparts.com/category/navien-nr-180a-ng-oem-repair-parts Less here https://www.appliancefactoryparts.com/hvac/quietside/dpw-120a.html They got into trouble with the DOE https://www.energy.gov/sites/prod/files/gcprod/documents/Quietside_Compromise_Agreement_oct7.pdf https://www.google.com/search?q=Quietside+ODW-180a+parts ..

See page 65 (Plumbing System) of user manual OWNER'S MANUAL (sunsettrailers.com)

Question edited for clarity and add maker. If this is in normal operation, turn off the gas and water and call a gas registered engineer. If you are turning off the water because you are going on vacation, turn off both the water and the gas. It may be sensing water flow because the pressure has dropped.

Your issue will be on the input or mains supply side of your electrics. Check your wiring for keakage to earth.

I had the same problem. The valve is not seating properly. I first took a plastic bag and placed it over the unit so it didn't spray all over, then, pushed the button several times to try to flush it. I then shut the water supply off (or move lever to bypass) and removed the cannister that holds the filter. I activated the red button several times until it looked like it seated well. Keep as much water in the cannister(sump) as you can and still have the filter seated properly. Screw it back on, and open the water supply slowly to fill the rest of the way. Don't push the red button again, but instead open a faucet in your house for around 5 minutes to let air circulate out. If the red button still leaks, you may have to try a few times. If it leaks just a little it may stop after a day or so. Once you get the red button to stop leaking, don't push it again! Just always use the open faucet method to work the air out. There will still be some air bubbles for awhile, but will work out within a day

remove intake to water pump put a extra hose into a antifreeze bottle then turn on pump and bleed all lines

test for sticking relay faulty circuit board or faulty stat

if water heater shut water off drain and replace it

Timer setting is given of page 11 of user manual User manual Honeywell CT1501 (English - 28 pages)

question edited for clarity and toss in some CAPS.It is a gas appliance, you shouldn't be working on it. Only gas certified techs are permitted to due to the danger of explosion.Service Handbook in the link, but statesSERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE TECHNICIANhttps://www.google.com/search?q=A.O.+Smith+water+heater+%28Model+BTH+300a+100%29+low+current+igniter+error+code..

Beware when working with electrical equipment. It may cause electric shock. Check the power supply wires, connections with heating coils. If they are ok then possibly heating coils require replacement.