rawhide Posted September 9, 2022 Share Posted September 9, 2022 Brand-new Thetford fridge freezer, fitted by registered fitter, can't get it to work on 12 v, gas 230v ok, any help much appreciated Link to comment Share on other sites More sharing options...
thebishbus Posted September 9, 2022 Share Posted September 9, 2022 Don't forget it should only work on 12 volt when the engine is running. It should be wired through a relay to the D output of the alternator. Brian B. Link to comment Share on other sites More sharing options...
rawhide Posted September 9, 2022 Author Share Posted September 9, 2022 Thanks Brian, i fully understand the 12v only driving yes, my suppliers have told not to be wired through a relay, apparently thers one fitted to fridge ,the fitter is bewildered about this ,getting info from Thetford is head banging Link to comment Share on other sites More sharing options...
Keithl Posted September 9, 2022 Share Posted September 9, 2022 Do you have a copy of the installation instructions for the fridge or can you post the exact model number so we can try and find them to help you? Link to comment Share on other sites More sharing options...
thebishbus Posted September 9, 2022 Share Posted September 9, 2022 If the fridge has a built in relay, you should check that there are +12 volts at its 12 volt input connection with the engine running, and a good 12 volt negative ground return. If they are correct the fault must be in the fridge. Brian B Link to comment Share on other sites More sharing options...
Keithl Posted September 9, 2022 Share Posted September 9, 2022 I'm wondering as the fridge has a built in relay if it needs a separate D+ signal to the permanent live connection? Link to comment Share on other sites More sharing options...
buddy Posted September 9, 2022 Share Posted September 9, 2022 If your new fridge freezer is a Thetford 3 or 4 series model it has a power control module that the 12v supplies are wired into they are , 12v HC for 12v heating element supply (from starter battery) , 12v LC for fridge controls (From the habitation battery) and a D+ engine running signal for the power control module. Link to comment Share on other sites More sharing options...
buddy Posted September 9, 2022 Share Posted September 9, 2022 To add to my other reply, I should have added that the wiring colours at the power control module are HC + = red (- = white ) LC + = purple ( - = black ) D+ = orange Link to comment Share on other sites More sharing options...
rawhide Posted September 9, 2022 Author Share Posted September 9, 2022 Although my reply looks like its Buddy only it isnt, its all of you who have offered help, we have more help from suppliers who have been very helpful, fitter coming tomorrow with stand alone battery with high v cable, will wire this then test fridge, if it works the solution is rewire fridge to engine battery with higher voltage cable , Vehicle is 2005 Burstner elegance which had dometic fridge in, told by suppliers quite a difference in power which is reason it wont kick in, Im optimistic , let you know outcome fingers crossed, i appreciate all help given, if it wins will post message hopefully useful to others, cheers Steve Link to comment Share on other sites More sharing options...
Keithl Posted September 10, 2022 Share Posted September 10, 2022 rawhide - 2022-09-10 9:23 PM Happy Days, were up and running, my cherished Trome is back in action, All help much appreciated So what was the problem??? Link to comment Share on other sites More sharing options...
rawhide Posted September 11, 2022 Author Share Posted September 11, 2022 If you read previous post, advice from seller was spot on ,your answer Link to comment Share on other sites More sharing options...
laimeduck Posted September 11, 2022 Share Posted September 11, 2022 rawhide - 2022-09-11 5:17 PM If you read previous post, advice from seller was spot on ,your answer Sorry ... I don't understand? Link to comment Share on other sites More sharing options...
onecal Posted September 12, 2022 Share Posted September 12, 2022 Hi, So are we to take it that the D.C. wiring/relay in your fridge was not up to spec' and replacing this solved your problem? Happy motor homing Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.