Domestic RM 3962 Won't power up

[stephenmulcare]

Having a problem with my Dometic RM 3962 in our Georgetown RV. When I tried to turn on the refer nothing happening. Checked all power sources and fuses but it won't turn on. The unit was working fine last time we went camping but did heat up in direct sun shine. The cooling fans mounted on the back of the unit were changed and the unit appeared to be working fine. Checked it today in preparation for a trip but here I am. Any Ideas before I call a tech?

Thanks
Stephen

 

[danemayer]

Hi Stephen,

Welcome to the Heartland Owners Forum.

Since it's a dual mode (propane and electric) model, if it's completely dead - no lights - neither mode operates - I'd start with the 12V DC side. Put a voltmeter on the fuses on the control board at the back of the fridge and make sure you have voltage on each side of the fuses to ground. And it'd probably be a good idea to re-check the fuses in your main fuse panel using a meter to make sure they're ok.

 

[stephenmulcare]

Hi Stephen,

Welcome to the Heartland Owners Forum.

Since it's a dual mode (propane and electric) model, if it's completely dead - no lights - neither mode operates - I'd start with the 12V DC side. Put a voltmeter on the fuses on the control board at the back of the fridge and make sure you have voltage on each side of the fuses to ground. And it'd probably be a good idea to re-check the fuses in your main fuse panel using a meter to make sure they're ok.

Thank you. I have checked everything I can possibly check. It's looking like it's in the mother board or associated electronic components. There's power up to the circuit board so I guess it's off to the shop. This refrigerator has been a problem since day one. Never again will I buy an RV with the fridge in the slide. Thans again and have a great weekend.

 

[wdk450]

Dan and All:
On RV Ammonia absorption refrigerators 12 volt DC power is the PRIMARY power source to the logic circuit board that controls ALL refrigerator modes of operation. If you have good 12 volts DC (and a good 12 volt DC ground) to the refrigerator circuit board, then you need to check all of the fuses on the circuit board, before replacing the board. A good source of aftermarket, better built circuits boards is Dinosaur Electronics which is sold through the RVCoolingUnitWarehouse (http://rvcoolingunit.com) at very good discounts.