The 540 troll we've just purchased as a fridge cooling fan . I've never experienced these on a caravan fridge before. My question is when would you reckon to use this fan ...and how long would you have it switched on for .

Thanks for that Colin

Get yourself a digital fridge thermometer, the fridge should read between 3 and 5 degrees. If you can’t maintain the desired temperature by normal adjustments with the fridge dial turn on your fans.

It appears our fridge fan doesn't have a thermal switch fitted only a on/off switch on the side of the sink unit
Are these fans designed to run continuous until you switch it off ie at bed time

I need to state first of all that we have never had such a system on any of our vans, but from what I’ve read Phil, these systems seem to be home-brewed, so there is no standard implementation.

We do have a 12v cool box which is generally left outside under the canopy, and this has a similar blower fan; we NEVER leave that running at night as it keeps SWMBO awake, so I’m usually sent out in my jimjams to turn it off. :-)

Steve.