Water heater not working

[vmar881]

I have a 2015 25FC rear twin my water heater stopped working on ac a few days ago breaker tripped. switched over to gas and ran for a few days but now it wont run on gas or electric. it fires off but after a few seconds the flame goes out. tries 3 times and goes into lockout.checked 2 amp fuse on controler and it is good. ideas

[HowieE]

The gas is failing on proof of flame. This is most likely the thermocouple to the gas valve. Visually check the flame shape is complete. If distorted clean the orifice or burner tube. Once a complete flame is present check that the coupling is in the flame. If that checks loosen the coupler at the gas valve and reset it to ensure a good electrical contact.

If the electric side is tripping a breaker it is a short. Most likely the element has shorted. Disconnect the wires to the element and read each side of the element to ground with an ohm meter. The element should show open on both sides. If one side show a short replace the element.

[damonbeals]

If the gas is lighting and your getting a flame then it shuts it off. That is the control board not being able to detect there is a flame. It detects a flame with the same device that creates the spark, but it also produces a small amount of electricity when it gets hot (ie from the flame). So check to make sure it is in the path of the flame. Check to make sure all the electrical parts are clean and no corrosion. If you want to debug yourself buy a new igniter, and if that doesn't fix it you will need a new control board.


Blowing a breaker on AC is a shorted heating element, which will need to be replaced.



Damon
#4827

[Backfortyjoe]

Sounds like the computer board. I had a very similar problem and fought it, replacing parts and making adjustments. I ended up putting a Dinosaur board into it and works like a charm. I highly recommend those boards for HW heaters, refers and furnaces.