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Old 07-31-2021, 12:31 PM   #1
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Join Date: Jul 2021
Location: Texas
Posts: 3
Question Dometic dm2652rbx fridge error slow blink

Hi everyone!
First post!
I just got home with my used tailor, 2019 Heartland Mallard 312.
The Fridge (Dometic dm2652rbx) was working now, the check light is on. It is a very slow long blink. On shore power it does not seem to get cold.

LP works and cools the freezer (error light, slow blink)
Shore power (Error light, slow blink)
I have heard the system click over from AC to LP. The LP ignites and then back to AC.
I have reset the panel (disconnected the plug to the upper board)
I checked all of the fuses (on the board and inside)
I have test all of the electrical connections per the manual.

Manual:
http://techsupport.pdxrvwholesale.co...ual-RM2652.pdf
No AC operation - operates on gas mode
-----------------------------------------------
Operation
AC Volts
Fuse
Heating Element
Wiring
Lower Circuit Board
-----------------------------------------------
1, page 07
2, page 09
5, page 19
3, page 11
9, page 24
5, page 13

Any suggestion, insite or super secret percussion calibration techniques to remedy the situation?
On AC how long should it take to get cold? (just general idea, I understand ambient temp can effect the time)
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Old 07-31-2021, 12:59 PM   #2
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IF connected to AC Power Source
Place fridge in AUTO
Fridge controls select AC when available ------priority source
Loss of AC...controls swap to GAS
Swaps back to AC when AC Power is restored

GAS Manual Mode
Operates only on GAS no swapping to AC

*Check Light happens when Gas fails to light & PROVE it lit via thermocouple

A warm fridge whether on AC Power of using GAS can take 12Hrs to fully cool down

A fridge already cold....AC or GAS come on when temp in food compartment increases above the thermostat setting
Your Model uses Auto Temp Control----no temp adjusting settings
YOU can affect the temp 6*f-8*f by moving thermistor UP/Colder or DOWN/Warmer
*Thermistor is temp sensor in clip on FIN in food compartment

Check Light ---only error/fault light on your model comes on SOLID...no blinking and should NOT come on when using AC
When Check Light comes on you have to turn fridge OFF/back ON to reset the fault

ON AC...swaps to GAS then Swaps back....all that going on in AUTO Mode?

Sounds Like circuit board is failing
'SEES' AC then looses AC---swaps to GAS...Gas fails (dirty burner assembly etc) then SEES AC and swaps back but Check Light slow flashing
Bad circuit board
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Old 07-31-2021, 01:22 PM   #3
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Thank you Old-Biscuit.
I believe I found the board, I will try and swap it out!
https://www.amazon.com/Dometic-33163.../dp/B00BURPLEW

Thank you very much for the insight!
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Old 07-31-2021, 01:43 PM   #4
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Check out Dinosaur Electronics Micro P-711 for replacement
Better quality circuit board

MICRO P-711 page
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Old 07-31-2021, 06:57 PM   #5
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Quote:
Originally Posted by Old-Biscuit View Post
Check out Dinosaur Electronics Micro P-711 for replacement
Better quality circuit board

MICRO P-711 page
Thank you I will!
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