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05-07-2023, 06:37 PM
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#1
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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Dometic/Attwood water heater
Dometic GC6AA-10E water works great on electric side but won't ignite on the gas side.
Tried new gas valve. Still don't light,
Tried new Circuit board. Still don't light.
I can see the spark.
What am I missing?
Thanks.
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05-07-2023, 07:40 PM
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#2
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 15,964
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Take a look at some of these videos from My RV Works. He's absolutely the best mobile RV tech I've found and is very methodical in his approach to diagnosing and repair. He shares his vast knowledge and ability with the world for free, and also has accumulated a library of manuals you can look for.
We all can throw out our ideas and thoughts in hopes of hitting on the cure, but Darren does a thorough step by step diagnosis and repair on video for the tough issues. I hope it helps. These are just for water heaters. He has many, many more for almost everything else.
Correct video posted below.
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Moderator
Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley
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05-08-2023, 10:18 AM
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#3
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Member
Join Date: Dec 2021
Location: Pocono Mountains
Posts: 45
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Igniter wire?
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2022 jayco eagle 321rsts
2024 RAM 3500 Laramie Cc DRW B&W OEM 25K hitch
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05-08-2023, 10:25 AM
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#4
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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It’s sparking
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05-08-2023, 10:31 AM
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#5
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Member
Join Date: Dec 2021
Location: Pocono Mountains
Posts: 45
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Mine was sparking too but it would not stay lit. Dealer tech diagnosed a bad igniter wire and replaced it. Now working great
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2022 jayco eagle 321rsts
2024 RAM 3500 Laramie Cc DRW B&W OEM 25K hitch
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05-08-2023, 11:10 AM
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#6
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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Gotcha.
That’s a cheap fix
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05-08-2023, 11:31 AM
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#7
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Senior Member
Join Date: Mar 2017
Location: North Texas
Posts: 3,604
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I think for most Dometic water heaters, the igniter and its wire is also the flame sensor and if the flame sensor doesn't sense a flame it will not stay lit (or maybe not even light at all). ~CA
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2010 GreyHawk 31SS
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05-08-2023, 02:35 PM
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#8
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Senior Member
Join Date: Apr 2017
Location: Inland Empire, California
Posts: 2,007
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I believe once the board initiates the sparking the next thing to take place is the gas valve receives voltage and opens. Have you checked the voltage across the gas valve?
If the valve is getting voltage the next thing in the equation is propane. Does your stove produce a good flame?
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Jim
Retired electronic technician (45 years in the field)
2017 Greyhawk 29W (solar & many other mods)
wife (maybe I should have given her top billing)
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05-08-2023, 04:58 PM
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#9
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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yes sir. the stove works great and has a good flame.
the valve is getting voltage, so maybe its in the igniter wire or at least I hope so.
Thanks
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05-08-2023, 06:35 PM
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#10
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 15,964
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Quote:
Originally Posted by 81greer
Dometic GC6AA-10E water works great on electric side but won't ignite on the gas side.
Tried new gas valve. Still don't light,
Tried new Circuit board. Still don't light.
I can see the spark.
What am I missing?
Thanks.
|
My mistake on the video I posted. I'm not sure how it went to the wrong one, so here's the correct video. It may be a little long, but it explains a ton.
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Moderator
Think you're too old to cry or swear out loud...walk into your hitch in the dark.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley
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05-09-2023, 04:29 PM
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#11
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Senior Member
Join Date: Aug 2019
Location: Avon
Posts: 569
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I think most gas valves are dual valves. Both have to function to get gas. You may have voltage to the valve but what if the coil inside the valve is open? Suggest checking resistance through the valve to a good ground. Just a thought.
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Keith and Lisa Ward
2019 Pinnacle 36FBTS
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05-09-2023, 06:54 PM
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#12
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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Tried a new wire. That is not the culprit.
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05-09-2023, 06:58 PM
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#13
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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I have even put a new valve on and still nothing.
Could it be in the thermostat?
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05-10-2023, 08:53 AM
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#14
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Senior Member
Join Date: Mar 2019
Location: Brunswick Hills
Posts: 916
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There's always the video. Guessing is not diagnosing. Guessing costs extra.
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Experience is what you get when you don't get what you want.
"We'll be friends until we're old and senile,....then we'll be new friends."
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05-10-2023, 09:05 AM
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#15
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Senior Member
Join Date: Mar 2017
Location: North Texas
Posts: 3,604
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Quote:
Originally Posted by 81greer
Tried a new wire. That is not the culprit.
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Did you install a new wire only or a new igniter and flame sensor? ~CA
https://www.amazon.com/Atwood-93868-...13416850&psc=1
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2010 GreyHawk 31SS
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05-10-2023, 09:07 AM
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#16
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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I’m assuming the voltage should be 12 volt.
I’m only getting 8.75 to the valve
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05-10-2023, 09:08 AM
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#17
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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New wire with the spark and sensor
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05-11-2023, 03:19 PM
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#18
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Senior Member
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 5,063
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If I’m following the symptoms correctly, there’s spark but no ignition. I noted new gas valve and igniter, stove works. Is the LP flowing when the igniter sparks?
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Cheers,
T_
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
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-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
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05-11-2023, 07:26 PM
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#19
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Member
Join Date: Sep 2020
Location: Greer
Posts: 40
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Gas is getting to the stove and it works great. It just seems it is not getting gas to the water heater valve. Assuming the gas side is 12 volt, I'm only getting 8.75 volts to the valve. Is this normal or could it possibly be in the switch on the panel? Just trying to think through it.
Thanks
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05-11-2023, 08:07 PM
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#20
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Senior Member
Join Date: Dec 2012
Location: Southern Indiana
Posts: 3,209
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Just out of curiosity, has it ever worked on gas? If not I would trace the gas line from the main and see if it has a kink in it.
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2017 Ford F-250 FX4 Crew STX 6.2l
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