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Old 10-15-2021, 10:00 AM   #1
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Dometic DM2652RBX

I have a Dometic 2652 that seems to work on gas but does not work on electric. Motorhome is plugged into shore power and fridge has auto button and gas button. Went into motorhome this morning and noticed check light on fridge was on and fridge was no longer cold. I turned the fridge off and back on in auto mode and gas burner ignited and seems to be cooling. Check light did not come back on. I think it should have come on electric. Any ideas?
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Old 10-15-2021, 11:43 AM   #2
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In Auto 120VAC is Priority ......IF available
If NOT available fridge swaps to GAS
If Gas hasn't been used in a while it can take several attempts to get ignition...if ignition fails 'CHECK' light comes on and locks out GAS attempts

SO
AC available....
Verify the 120VAC out has power
Check/Verify the 5A fuse on lower circuit board is GOOD ----Test it and the fuse clips/not just LOOK at it
Fuse good then check/verify the AC Heaer Element is being energized


See Item #3 pg 4 troubleshooting
*RM models and DM models are the SAME....just different production facility/model designations. SAME/SAME
http://techsupport.pdxrvwholesale.co...ual-RM2652.pdf
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Old 10-15-2021, 01:13 PM   #3
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Thanks… I’ve checked the voltage, got 120 on both ends of fuse but no voltage to heater element. Disconnected heater element and checked ohms and we’re around 44ohms. So, heater element should be ok? Does this mean bad circuit board? Thanks for the response!
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Old 10-15-2021, 01:45 PM   #4
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Quote:
Originally Posted by RLudlow View Post
Thanks… I’ve checked the voltage, got 120 on both ends of fuse but no voltage to heater element. Disconnected heater element and checked ohms and we’re around 44ohms. So, heater element should be ok? Does this mean bad circuit board? Thanks for the response!
YES....

DC Relay on circuit board that allows AC to element leads when in Auto and AC is available is not seeing the AC


The Dometic 3850415013 circuit board is No Longer Available
Replacement KIT here
https://pdxrvwholesale.com/products/...-3308741002%20
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Old 10-15-2021, 02:00 PM   #5
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Thanks! Circuit board that is in it is 3850712-01, if that makes a difference.
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Old 10-15-2021, 02:13 PM   #6
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Sounds like somene replaced OEM with a Dinosaur Electronics Circuit Board
Replacement boards for Dometic
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Old 10-15-2021, 05:19 PM   #7
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I went to the RV dealer where I bought the motorhome and got a new circuit board. Came home and replaced the old one with the new one. Plugged fridge back in and put fridge on auto. Fridge lit back up on gas…….still no AC operation. Getting frustrated.. Any more ideas, anyone?
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Old 10-15-2021, 09:05 PM   #8
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Originally Posted by RLudlow View Post
I went to the RV dealer where I bought the motorhome and got a new circuit board. Came home and replaced the old one with the new one. Plugged fridge back in and put fridge on auto. Fridge lit back up on gas…….still no AC operation. Getting frustrated.. Any more ideas, anyone?

What is the board part number you have?

Has AC EVER worked on this fridge???

Think wrong board was used.......if so upper control can't properly communicate with that lower board
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