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Open Roads Forum  >  Tech Issues

 > Atwood water heater won't stay on.

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BFL13

Victoria, BC

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Joined: 02/15/2006

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Posted: 09/15/20 01:30pm Link  |  Quote  |  Print  |  Notify Moderator

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?


1. 1991 Oakland 28DB Class C
on Ford E350-460-7.5 Gas EFI
See Profile for House electronics set-up.
2. 1991 Bighorn 9.5ft Truck Camper on 2003 Chev 2500HD 6.0 Gas

doxiemom11

Paris Michigan

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Posted: 09/15/20 03:32pm Link  |  Quote  |  Print  |  Notify Moderator

When ours did that, it was the circuit board

Old-Biscuit

Verde Valley

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Joined: 06/20/2009

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Posted: 09/17/20 09:49am Link  |  Quote  |  Print  |  Notify Moderator

"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."


One of 2 things
Spark electrode is also used as flame proving signal return
Electrode soot/carbon will impede the milliamp flame signal that circuit board must sense or it drops DC to gas valve
Clean tip using emery cloth

Circuit Board.......valve track on circuit board is failing

Contact Atwood (Dometic) and inquire as to getting a new board...they have had some issues and replace them for free.


Is it time for your medication or mine?


2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
On the Road Debt Free April '07
Off the road still Debt Free Jan. '14

Dusty R

Charlotte Michigan 48813

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Posted: 09/17/20 10:25am Link  |  Quote  |  Print  |  Notify Moderator

A guy came to me once with that kind of problem once. I asked him if he had filled the water heater tank with water. He disappeared, for a couple of minutes then came back and turned water heater on, all worked fine then.

Old-Biscuit

Verde Valley

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Posted: 09/17/20 01:25pm Link  |  Quote  |  Print  |  Notify Moderator

Dusty R wrote:

A guy came to me once with that kind of problem once. I asked him if he had filled the water heater tank with water. He disappeared, for a couple of minutes then came back and turned water heater on, all worked fine then.


'trailrider' asked that question back on Pg 1 9/12/2020 and no direct answer.
"The obvious question is: "Is the water heater full of water?"

asptrader

Central Oregon

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Posted: 09/20/20 01:25pm Link  |  Quote  |  Print  |  Notify Moderator

I have a problem very much like what Paul1944 describes...

-- New Atwood Gas G6C-8E-SP water heater in my RV
-- When Remote Switch is switched on, light turns red, then off within 10 seconds usually
-- Water heater stays on for 10 to 30 minutes, then turns off
-- The Remote Switch light does NOT turn back on
-- I cannot turn light off and then back on for an hour or two
-- After the shutdown, the sink running water is definitely warmer for 10-15 seconds so I know the heater has heated water. I assume that means there is water in the tank.

-- I installed a new RV Water Heater Thermal Cut Off Switch Kit Replace for Atwood 93866 - understood that it probably wouldn't make a difference but installed it anyway. It doesn't appear to break after cutoff and water heater can restart sometime later (like an hour or two later)
-- I purchased a new Atwood 91447 Thermostat Assembly and can install it if that would make for a difference

Old-Biscuit wrote:

"Model is GC6A-8E
Flame is more orange than blue.
There is a wire with what looks like a resistor in it, what is that for?"

8E has separate controls for electric & gas
ELECTRIC:
120VAC comes from a Circuit Breaker to on/off switch (backside of WH Tank) then thru set of T-stats to element (also backside of WH Tank)

GAS:
12VDC comes from Fused source to 'thermal cut out' (fuse in clear tubing----it blows at 190*F if flame blowback occurs and stops ALL DC to water heater. One shot device --replace if bad)
From thermal fuse DC goes to/thru TT-stat then to circuit board
Circuit Board then sends DC to ECO/Gas Valve AND spark electrode

From Old-Biscuit earlier comments, I take it that I should pay anything to the follow... Anything else?

=============
Posted earlier by Old-Biscuit
When flame lights off......is flame BLUE and quiet (very slight roar)?
IF NO (YOU stated more ORANGE then Blue)
Might need to adjust air shutter ---typically only needs to be roughly 1/4 open
Might need to clean orifice (soak in alcohol/air dry), clean burner tube (small bottle brush)
=============

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