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Dometic 2-Way fridge repair issues

Jacob_ricottone
Explorer II
Explorer II

Hey everyone, I've got a 1995 Salem Travel trailer with a Dometic 2-Way fridge. Fridge wasn't working when purchased (no power in the upper controls), but after looking into it I thought I could fix the problem.

So as it stands right now I don't have the gas function operating (battery won't hold its charge) but I am plugged into shore power. 

I've opened up the access panel at the back of the fridge to the control board and started doing some poking around. I grabbed a multimeter and started checking my connections. I was getting 120v at the plug (that the fridge is plugged into), 120v going into the board from the plug, and 120v at my fuse on the control board. Although I went and tested the connection between the main control board and the upper control board (the two buttons at the top of the fridge) and I wasn't getting any read on power going to the upper control board. 

This made me believe that my main control board had gone faulty seeing as I was getting power to it and through it, but not out of it. I then purchased a replacement board from amazon that matched my product number of the old board (2932177.01) and installed it, triple checking that my connections were in the right spot. 

Once everything was plugged in I went to check to see lights on the upper control board and still nothing. Went back to the main board with my multimeter and still wasn't getting power going to my upper control board connection, even on a brand new board.

I'm honestly lost as to what it could be. The only thing I can think of is if the board needs both systems operational to allow use (120v and 12v both working). Or maybe I'm crazy in thinking that. In my mind it should work without needing the 12v from the battery, then again could be completely wrong. 

I would appreciate any suggestions, thanks.

1 ACCEPTED SOLUTION

stevenal
Nomad II
Nomad II

Definitely a problem on the 12 V side. It occurs to me the car battery does not share a ground reference with the trailer. I don't know if this could affect it. 

Some of these old convertors require a good battery for filtration. I would start with a new house battery and work from there.

'18 Bigfoot 1500 Torklifts and Fastguns
'17 F350 Powerstroke Supercab SRW LB 4X4

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6 REPLIES 6

stevenal
Nomad II
Nomad II

Definitely a problem on the 12 V side. It occurs to me the car battery does not share a ground reference with the trailer. I don't know if this could affect it. 

Some of these old convertors require a good battery for filtration. I would start with a new house battery and work from there.

'18 Bigfoot 1500 Torklifts and Fastguns
'17 F350 Powerstroke Supercab SRW LB 4X4

Hooked up a new battery and figured out the issue with the converter, fridge is back up and running. Thanks for your help!

1000002916.jpg

Great to hear it is just that simple. We will deal with 2-way fridge in the incoming Salem Trailer project once we're done with the mods on the Silverado. The tires, moto metal wheels, and rotors showed up. We're gonna start with a new battery for the Salem.

I'll give it a shot. Trailer should get a new battery anyway. I'll also take a look at the inverter, try and troubleshoot. Thanks!

opnspaces
Navigator II
Navigator II

It definitely needs 12v to run. But you should be getting that 12v from the converter when you are plugged in. Try unplugging the shore power and take a reading at the battery with your volt meter. Then plug the shore power back in and take another voltage reading. If your converter is working you should see a jump in voltage to at least 13.6 volts.

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2001 Suburban 4x4. 6.0L, 4.10 3/4 ton **** 2005 Jayco Jay Flight 27BH **** 1986 Coleman Columbia Popup

https://youtu.be/Ux1cMnx49SU?si=_fryNT27AN8sPC9X 

Here's a video explaining the issue I have.