Three way caravan fridge

Submitted: Wednesday, Jan 14, 2015 at 17:53
ThreadID: 110742 Views:1718 Replies:2 FollowUps:8
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Hi all.

Got back from our round Australia trip and had no fridge problems, but went off up the coast on new year and discovered that the fridge was not working on DC, so I have tested connection on car side, van side, and all fuses, all looks OK, but behind fridge I cant find power.

Any suggestions appreciated.

Cheers

Rob.

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Reply By: Keith H7 - Wednesday, Jan 14, 2015 at 19:00

Wednesday, Jan 14, 2015 at 19:00
Often I have found that if the fridge/Caravan is not level the fridge does not work on AC or DC. Try on AC first then Gas.... then change over to DC. A = Arive at park D = Depart park.
AnswerID: 544269

Follow Up By: Member - escapesilv - Wednesday, Jan 14, 2015 at 19:09

Wednesday, Jan 14, 2015 at 19:09
Thanks Keith

It works well on AC and Gas, but when I put it on DC for traveling, it just does not work.

Cheers.

Rob
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FollowupID: 831370

Follow Up By: disco driver - Wednesday, Jan 14, 2015 at 19:57

Wednesday, Jan 14, 2015 at 19:57
Somewhere in the back of the fridge there will be a 12v heating element, unless there is a fault in the wiring, that's a likely culprit.

Disco.
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FollowupID: 831378

Follow Up By: oldtrack123 - Wednesday, Jan 14, 2015 at 21:38

Wednesday, Jan 14, 2015 at 21:38
Hi
Brand & model number of fridge could save a lot of wild guessing.!

But with most the 12V element rarely burns out

It is the 240V element that can have a short life with some models

If you can get to the back of the fridge you should be able to see the12V input terminals BUT TURN OFF & remove the 240V plug before poking around in there.
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FollowupID: 831390

Follow Up By: Member - escapesilv - Thursday, Jan 15, 2015 at 08:02

Thursday, Jan 15, 2015 at 08:02
Thanks disco driver and oldtrack.

Its a Dometic 90 Lt.
Opening up at the back I can't see the heating element but there are 2 terminal connections one says ignition and the other says heating, and there is no power there. looks like I may need an electrician.

Cheers


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FollowupID: 831405

Follow Up By: Member - John and Lynne - Thursday, Jan 15, 2015 at 20:13

Thursday, Jan 15, 2015 at 20:13
We had a similar problem and then our fridge fuse started to blow in hot weather. In absolute desperation we actually checked the fridge manual! It seemed the fuse was too small. We installed the correct fuse and no more problems on DC. Lynne and John
John & Lynne

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Reply By: Member - Nutta - Thursday, Jan 15, 2015 at 20:36

Thursday, Jan 15, 2015 at 20:36
I thought that was standard for 3 ways on dc, they just never run properly.

Personally i wouldn't worry about it.
AnswerID: 544340

Follow Up By: Member - escapesilv - Thursday, Jan 15, 2015 at 21:02

Thursday, Jan 15, 2015 at 21:02
Hi Nutta.

You are correct, but this one just does not work at all.

Cheers

Rob.
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FollowupID: 831447

Follow Up By: oldtrack123 - Thursday, Jan 15, 2015 at 22:54

Thursday, Jan 15, 2015 at 22:54
Hi
Most of them never run properly on 12v because most of them are never wired properly
.Most of them do not get 12V at their terminals WHEN running!!!
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FollowupID: 831452

Follow Up By: Nomadic Navara - Thursday, Jan 15, 2015 at 23:42

Thursday, Jan 15, 2015 at 23:42
They all run pretty well when heavy enough wire is used. I am yet to see a caravan constructor install wiring the size required by Dometic.

Some of the later models have elements of the same rating as the 240 V element and include thermostats them over cooling the fridge.
PeterD
Retired radio and electronics technician

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