Atwood Water Heater gas comes on-only electric switch is on

[nazpaz]

I flushed out my water heater today. Got a lot of the white flakes out of it. I put the plug back in, turned the water on, and then flipped the 110v water heater switch. However, when I did that, the gas came on and heated it up. The gas side was turned off. If I turn 110v off and turn the gas side on, the gas lights and it heats. If I turn the gas side off and turn only the electric on, the gas lights and it heats.

It was all working fine until today.

Any thoughts would be welcome.

[nazpaz]

Old-Biscuit wrote:
Atwood OEM water heater circuit board is 'encased' in epoxy....


Dinosaur Electronics make a quality board.
But you will also need not just their board but the mounting plate and protective cover cause it is an exposed circuit board and is in the outside compartment/environment

Do the mounting plate and cover have to be ordered separately or do they come with the board? Thanks.

[Old-Biscuit]

Atwood OEM water heater circuit board is 'encased' in epoxy....


Dinosaur Electronics make a quality board.
But you will also need not just their board but the mounting plate and protective cover cause it is an exposed circuit board and is in the outside compartment/environment

[wopachop]

Might be possible to fix the circuit board if you like to tinker and want to save cash. Ive fixed a few over the years. (not an RV water heater though) Maybe the members on here can let you know how easy it is to expose the board and take a picture.

[nazpaz]

deltabravo wrote:

nazpaz wrote:
Thanks for the info. Looks like I need to order a new circuit board!

Check out a company called Dinosaur Electronics. They make really good replacement circuit boards for a lot of different RV appliances.

https://www.dinosaurelectronics.com/

They are way better than the original circuit boards from what I've heard / read.

Thanks for that suggestion. I saw elsewhere on this forum where Old Biscuit also recommended the Dinosaur. Sounds like a good suggestion.

[deltabravo]

nazpaz wrote:
Thanks for the info. Looks like I need to order a new circuit board!

Check out a company called Dinosaur Electronics. They make really good replacement circuit boards for a lot of different RV appliances.

https://www.dinosaurelectronics.com/

They are way better than the original circuit boards from what I've heard / read.

[nazpaz]

Thanks for the info. Looks like I need to order a new circuit board!

Old-Biscuit wrote:
Circuit Board has shorted........

Both gas and electric use 12VDC for control
DC comes from Electric and/or Gas On/Off Switches to the common circuit board
White wire is from Electric Switch
Orange wire is from Gas Switch

Electric is shorting across to Gas circuit...




**2004 Atwood starting using the 'common DC control' for 6 gal & 10 gal models

[Old-Biscuit]

Circuit Board has shorted........

Both gas and electric use 12VDC for control
DC comes from Electric and/or Gas On/Off Switches to the common circuit board
White wire is from Electric Switch
Orange wire is from Gas Switch

Electric is shorting across to Gas circuit...




**2004 Atwood starting using the 'common DC control' for 6 gal & 10 gal models