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Topic: Dometic fridge wont revert to ac (Read 324 times) previous topic - next topic

Dometic fridge wont revert to ac

We've been on the road for about a week. 3 years now owning never a problem with the OE dometic going from ac to gas and back. All this week out, gas while on the road auto goes to ac when on shore... but not this eve. All ok with AC to fridge,  but won't go to ac, stays in gas.... have turned off a few times but goes straight to gas, toggled auto switch few times still no luck....bad black fridge control box maybe?.... plenty of propane to stay on it till home  just curious if anything obvious to search for. Yes have tested ac supply to fridge all ok... to dark n cold to test much further tonight.
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Dometic fridge wont revert to ac

Reply #1 –
We had the same issue last month - fridge worked fine on gas, but wouldn't switch to AC. There is a small glass fuse in the control box that we had to replace. I'd check there before replacing the whole control box!
Tim and Dory

1992 U280 40'
2007 Jeep Wrangler toad

Re: Dometic fridge wont revert to ac

Reply #2 –
Thanks... will check that in the am... seems i recall seeing 1 in there when i did some work on it few years back.
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Dometic fridge wont revert to ac

Reply #3 –
The control box you stated. That is located behind the fridge and visual when the vent is opened on the outside? I have the RM 7832
Peter    Alberta Canada
'98 U320 40'  Build 5359 M11 450 HP, Aqua hot, Blu Ox

Re: Dometic fridge wont revert to ac

Reply #4 –
Quote from: Tim D –
We had the same issue last month - fridge worked fine on gas, but wouldn't switch to AC. There is a small glass fuse in the control box that we had to replace. I'd check there before replacing the whole control box!
Yep, that was it.  The 5A glass fuse on the board had light oxidation on contacts but was also internal broken (not blown) had a few in my tool box. Put a small amount of no-ox lube on the ends of it and the other 3A, back in business.... good call.
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Dometic fridge wont revert to ac

Reply #5 –
Quote from: Peter –
The control box you stated. That is located behind the fridge and visual when the vent is opened on the outside? I have the RM 7832
Yes. Had a screw on top then cover pops off.
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Dometic fridge wont revert to ac

Reply #6 –
Quote from: mkc1962 –
Yep, that was it.  The 5A glass fuse on the board had light oxidation on contacts but was also internal broken (not blown) had a few in my tool box. Put a small amount of no-ox lube on the ends of it and the other 3A, back in business.... good call.

Great, glad that was it - much easier (and cheaper) than the alternative!
Tim and Dory

1992 U280 40'
2007 Jeep Wrangler toad