Driving with fridge on

Paul Norman replied on 03/08/2019 12:55

Posted on 03/08/2019 12:55

Hi everybody, Being newbies to the motorhome community we were wondering if it is ok to leave the fridge running on 12v whilst driving.

EmilysDad replied on 22/08/2019 23:34

Posted on 22/08/2019 21:35 by Ph1lTurner

May I ask a question in relation to this. I drove from the Devon to Abbey Wood (5 1/2 hours). I turned the fridge on for a good 15+ hours before and then connected to the car for the drive up. When we arrived the fridge had lost its coldness and warmed up.

For it to work on battery setting did we need to turn the "Mains" switch to on as well - we left it off? If not would need to get checked at next service.

Thanks

Phil.

Posted on 22/08/2019 23:34

You should just need to select 'battery' on the fridge and nothing else .... Mains on or off won't make a difference.

KjellNN replied on 23/08/2019 23:11

Posted on 22/08/2019 17:19 by pete490194

thank for your input, I was wondering if the power board was at fault but at a replacement of £115 I hope not but I get the same fault when running the fridge from the leisure battery which makes me wonder if it is the power board....the fault finding continues frown

 

Posted on 23/08/2019 23:11

You cannot run the fridge from the leisure battery if your van is wired correctly.

This may be of help.......

 

https://caravanchronicles.files.wordpress.com/2013/03/troubleshooting-fridges.pdf

KjellNN replied on 23/08/2019 23:16

Posted on 22/08/2019 21:35 by Ph1lTurner

May I ask a question in relation to this. I drove from the Devon to Abbey Wood (5 1/2 hours). I turned the fridge on for a good 15+ hours before and then connected to the car for the drive up. When we arrived the fridge had lost its coldness and warmed up.

For it to work on battery setting did we need to turn the "Mains" switch to on as well - we left it off? If not would need to get checked at next service.

Thanks

Phil.

Posted on 23/08/2019 23:16

Could be the power board or a fuse.

However, it should have stayed cold for that time if it was chilled well beforehand.

KjellNN replied on 23/08/2019 23:29

Posted on 23/08/2019 23:29

Edit,,,,,,got the 2 problems muddled!

to Phil....,,,,could be your 12v heating element is broken.

to Pete,,,,,,fuse or power board maybe.

replied on 23/08/2019 23:44

Posted on 23/08/2019 23:16 by KjellNN

Could be the power board or a fuse.

However, it should have stayed cold for that time if it was chilled well beforehand.

Posted on 23/08/2019 23:44

However, it should have stayed cold for that time if it was chilled well beforehand.
 

Indeed it should stay chilled. I never bother to turn my fridge on to battery option. I leave home chilled and tour from site to site without problem. The longest without power is probably 4.5 hours

KjellNN replied on 24/08/2019 00:51

Posted on 24/08/2019 00:51

Another thing to consider, if the 12v does not seem to be keeping the fridge cold at all, is what is your car doing?

If it is a newish car, say under 4-5 years old, it may be one of those that minimises everything to save fuel and thus have lower emissions.

For example, the VW we have, 3 years old now, is correctly wired as regards the 13 pin socket but as I understand it,  the alternator will only produce power when the car battery needs it, and when you brake it can return power to the battery.

So the first thing to do, we were advised, is turn off the stop/start function when towing, and also turn  on dipped headlights.  Using from the battery will help fool the alternator into producing more power, hopefully a high enough voltage to charge up the van battery and run the fridge.

Even doing this, we found that the van battery was not getting enough charge for any prolonged Mover use on arrival on site, and we had no idea what was happening with the fridge.  It did stay cold enough however, as discussed above,

The eventual solution was to invest in a "battery to battery" charger that is fitted in the van.  This device takes whatever DC voltage it gets from the car and converts it to a high enough voltage to charge the battery and run the fridge,

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