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Old 08-25-2019, 06:47 AM   #1
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Dometic RM3604 No Gas No Spark

Hello all, I have a Dometic RM3604 Most of the time it will not spark or open gas valve(will not light with lighter).
I have had this problem for years. Unplug at campground fridge won't light on gas, after a half hour or so of driving it will finally light on gas.
Gas valve has 19.2 ohms. (20 is spec.)
12volts going to igniter.
New electrode and lead.
Clean burner tube and jet and therocouple
All ground wires checked with continuity test.
The other day it rained and I tried fridge and it worked on gas. Now it won't fire. Tried 100 times since rain.
Do you think I need a new Control board?
Thank you!

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Old 08-25-2019, 10:03 AM   #2
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Posts: 10,332
Your symptoms suggest ground issue or a circuit board issue

The testing on your model of fridge can get confusing so rather then try to explain the procedure I have included a link to the Service Manual
See Section 4:10 Step 4 (pg 8 of manual) for test procedure on circuit board

Read it carefully, understand what you need to do BEFORE doing it.
DC must be ON to fridge and fridge ON so circuits will be LIVE


Hope that helps.

Is it time for YOUR medication or MINE
2007 Dodge 3500 w/Tractor Motor & NUWA 5vr
US NAVY---USS Decatur DDG-31
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Old 08-25-2019, 12:01 PM   #3
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Old Biscuit gives great advice! Have fun and keep her between the ditches!

Good luck, happy trails, and God bless!
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 08-26-2019, 03:06 AM   #4
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Thank you very much.
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Old 09-03-2019, 04:53 PM   #5
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Updateid test's and failed #3 (below). Checked continuity through harness and was ok. So I got lucky and found the upper board on ebay. Fingers crossed, we will see if it fixes Problem.
Thanks again, I'll let you know if it works.

NOTE: The following checks should be made on the
upper circuit board and harness assembly BEFORE
replacing the upper circuit board or wiring harness.
These checks are to be done with the wiring harness
REMOVED from the lower circuit
board and the ONOFF switch
turned to "ON".
Measure resistance between the
brown terminal on the 7-pin
connector (positive [+] lead from
meter) to the brown terminal on
the 10-pin connector (negative
[] lead from meter). The proper resistance is
approximately 26,000 ohms.
NOTE: If the check on the AES function lamp is not
correct, verify the wire harness has continuity. If wire
harness is good, replace the upper circuit board.
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