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.

Circuit Board has shorted........Both gas and electric use 12VDC for controlDC comes from Electric and/or Gas On/Off Switches to the common circuit boardWhite wire is from Electric SwitchOrange wire is from Gas SwitchElectric is shorting across to Gas circuit...**2004 Atwood starting using the 'common DC control' for 6 gal & 10 gal models

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 controlDC comes from Electric and/or Gas On/Off Switches to the common circuit boardWhite wire is from Electric SwitchOrange wire is from Gas SwitchElectric is shorting across to Gas circuit...**2004 Atwood starting using the 'common DC control' for 6 gal & 10 gal models

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.

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.

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.

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

Old-Biscuit
Explorer III
May 16, 2020
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
nazpaz
Explorer
May 16, 2020
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
deltabravo
Nomad
May 16, 2020
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
Explorer
May 17, 2020
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.
wopachop
Explorer
May 17, 2020
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.
Old-Biscuit
Explorer III
May 17, 2020
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
nazpaz
Explorer
May 17, 2020
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
Explorer III
May 18, 2020
nazpaz wrote:
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.

The Dinosaur Electronics UIB 64 Ignitor Board DOES come complete...mounting & cover
UIB 64 Info
nazpaz
Explorer
May 18, 2020
Old-Biscuit wrote:

The Dinosaur Electronics UIB 64 Ignitor Board DOES come complete...mounting & cover
UIB 64 Info

Thanks again! I have one ordered.
STBRetired
Explorer
May 18, 2020
Before you install the board, you might want to make sure that the white and orange wires are not shorted together somewhere between the switches and the control board.