Atwood water heater won't stay on.

Look at your furnace. Many use the same circuit board. If yours is the same, swap it with the water heater. If it works, you know it is the circuit board.
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I have had lots of WH problems, solved by help here. Nevertheless, I am having trouble following this thread to be able to suggest anything useful.

1. Is the red light, the red light inside the RV that always comes on as soon as you turn on the WH (with gas) and then goes out when the flame starts?

2. When it runs for a few minutes, does that red light go out at first as it should, but comes back on when the furnace quits?

3. After the 10 minutes or so when it comes back on, does the red light go out again?

4. After that, how long does it run?

5. If it has water in it, then the real question is whether that water is already hot from being on electric mode prior. That would perhaps explain why it goes out for 10-15 minutes, giving it time to cool again before it cycles. Not sure about that---the water will stay hot a long time unless it gets used and replaced with cold water refill

Just very confusing (but I am easily confused so no worries :) )

G6A-8E is a GAS Only Atwood

2 things can cause Red Fault Light
* Flame failure
*ECO tripping OR bad connections on terminals/spade connections

Check continuity thru ECO
Check IF RED wire has 12VDC on it FROM circuit Breaker when switch is on
Could very well be bad circuit board 'Valve Track' circuit

I would first check all the connectors. Atwood uses spade connectors that often do not work well. Secondly I would replace the detector assembly. They are inexpensive and often fail after a few years of use.

Attwood has a good troubleshooting guide on line and tell you how to test the board. If it is not a potted board I would just remove it and look at the backside and see if there are any burned areas on the solder tracks or any burned components. 2017 is fairly new, but boards do fail howeverI would remove and clean all connections first.

Paul1944 wrote:
since the red "DCI-FLT" comes on immediately when I turn on the switch I'm beginning to suspect I have a bad circuit board. What do you think?

Unless I missed it - nobody seems to be responding to this. It is perfectly and completely normal for that light to come on immediately. That shows you've turned on the switch and there isn't a fun flame yet - it takes a few seconds to light.

As far as your flame going out after it lights - that is what your problem is.

Suburban uses the Fault Light ON when switch is turned ON then it goes out when trial for ignition occurs then will come back on IF flame fails

Atwood??????
Fault light is triggered by a fault...flame failure or ECO

Fault Light Should NOT come on when 1st turning switch on



See pg 21 for testing 'Power Track', 'Lamp Test', 'Valve Track'
Atwood Service Manual

My gas only Atwood red light comes on first then goes out when the flame catches (you can hear that) and stays out

When I was having troubles getting it to light, the red light stayed on or would come back on after going out.

If the OP answers my earlier questions, that might help.

BFL13 wrote:
My gas only Atwood red light comes on first then goes out when the flame catches (you can hear that) and stays out

When I was having troubles getting it to light, the red light stayed on or would come back on after going out.

If the OP answers my earlier questions, that might help.

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The red light comes on ONLY when the main switch is initially turned on. As soon as the WH ignites, the red light goes off and never comes back on again. After shut down for about 10-15 minutes the WH ignites again, the red light does NOT come on, runs for about a minute or so then shuts down again. This is a gas only WH, no electric.

It is acting as though the water is hot and then after 10-15 min it thinks the water needs heating again to keep it hot. Must be a thermostat issue?