water heater

cpaulsen wrote:
Sububran water will not ignite when on propane....electric portion works fine.....and yes...I do have propane

Batteries enabled?
Usually need 12VDC power for w/h operation. For control board and DSI.
Other propane appliances working?

cpaulsen wrote:
Sububran water will not ignite when on propane....electric portion works fine.....and yes...I do have propane

Did you try to reset the 12v Tstat?

Does the red light by the switch come on and just stay on, or does it not come on at all?

Does your digital voltmeter say the switch is getting 12v at all? If yes, is it getting to the circuit board? (Jumper the wires by-passing the switch to see if it is the switch failing to make the connection--if so get anew switch)

will the stove light? if so let the burners burn for about 30-seconds and try again. you may have air in the line.

rk911’s suggestion is spot on.

Ours is an Atwood, but exactly the same problem - wouldn't light on gas, worked fine on electric. It was the circuit board on ours.

There was a bad run of controller boards. Get a dealer to check your board and install a replacement. (30 min job all told) A good shop will do all the warranty paperwork for you. (Thanks Xtreme RV Idaho)

rk911 wrote:
will the stove light? if so let the burners burn for about 30-seconds and try again. you may have air in the line.

I keep hearing this but frankly.. Think about it. Stove sips propane. Water heater guzzles it. (Same for Furnace) Water heater will try 3 times before it locks out.. You'd need like 100 feet of line full of air or more before the first two attempts would not purge.

But that said.. Won't hurt to light the stove as that confirms the propane system is indeed working.

To the O/P. You need to observe while someone else turns it on.

Does it light, go out re-light (three times no relight the 3rd time)

Does the thing make sparks (Snap SNap) but no ignition

Does it just sit there like it was turned off.

Once we know that we can get more specific.

All stove burners light....turn the gas water switch on......does not attempt to light.....red light does not come on. Have pretty much figured out the control board is bad. Did try the reset........no luck there also. Will order a new control board.2018 Montana HC...2 years old. Thinking the board is behind the convenience center.....will clean the basement storage out so I can remove the panel out so I can see if it is back there.

AFAIK, the switch is before the board, so first you should pull the switch with its red light, jumper the switch wires (not the light's) and see if that makes it all work.

Next is the connection of the wires to/from the switch and board at the board. I had an Atwood where that was the problem. Unplugged and plugged back to the board, which cleaned the contacts, and then the red light at the switch came on and everything worked.

Before jumping to conclusions......do a little testing

Use voltmeter and check for 12VDC at the t-stats (under the cover above gas valve...right side is the 12VDC set for the propane)
DC comes from battery/dc dist fused source to the top t-stat (RED Wire) then goes to bottom t-stat via connection wire)
Got DC to top and out bottom then check for it at the circuit board.

No DC..then problem is back at On/Off switch OR from FUSED source.

Suburban rarely have issues with the circuit boards

ATWOOD DID Have for several years (2016 - 2018) due to change in vendor (Zhongding)

Little DC testing will pin point the issue quickly. THen you can buy/fix what is broken vs throwing parts at it