fridge 12v problems?

mickrumble
mickrumble Forum Participant Posts: 29
edited February 2014 in Caravans #1

Hello everyone, I have a 2006 Ace Tristar with a dometic fridge. There is a rotary control knob on the top of it marked off, gas,240v and 12v. On the main caravan switchgear there is a rocker switch marked car, and van. Between these two positions is a detent
which I assume is 'off'. When I bought the van I was told that with the van switch on 'car' and the fridge on 12v AND THE CAR ENGINE RUNNING, the fridge would work. Obviously the intention is to enable the fridge to operate whilst travelling. On my outfit
this does not appear to be happening. The 12v indicator light does not come on. Have I got this bit right ? I have very recently changed cars and the 12v facility never worked on the old vehicle. The electrics on the new vehicle have been fitted by a reputable
electrician so I suspect that either I am looking for something that does not exist, or there is a fault on the caravan circuitry. Any suggestions anyone?