#110329  by kiwipete
 Sun Mar 20, 2016 2:52 pm
I see there has been some talk of late regarding the UK fridges not quite being up to speed with our Southern Hemisphere hot summers.

We had a serious issue with our fridge that I will talk about in detail in another thread soon.
One suggestion that came of this issue was to install some fans as others have done.

This is my install;

70 deg thermostat switch secured in place with wire ties and silicone heat transfer paste.
http://i195.photobucket.com/albums/z218 ... 1olclt.jpg

Fans mounted.
http://i195.photobucket.com/albums/z218 ... km3ues.jpg

You wouldn't know anything had been done :D
http://i195.photobucket.com/albums/z218 ... vdgkvz.jpg

All wired through to the battery via a 3A fuse.
 #110340  by 96coaster
 Sun Mar 20, 2016 5:22 pm
I have used device in link below to switch cooling fans and they work well (to date) . By setting DIP switches in various configurations, the "on" temperature can be altered and the "off" temperature is set in same was (i.e can be set for on at say, 30 deg and cool until temp has dropped by amount set. Only draw back is that they would use a very small amount of power even when idle. (see specs) and go against KISS principal (although cheap enough to buy couple of spares)

http://www.ebay.com/itm/Heat-Cool-Temp- ... SwLzdWTo6b
 #110343  by mattn
 Sun Mar 20, 2016 6:26 pm
IMHO That solution is over engineered. All you need is a fan (or two) and a switch. Switch the fan on when the fridge is use. I cannot fathom why you would need a thermostat.
 #110347  by kiwipete
 Sun Mar 20, 2016 7:49 pm
I have the fridge on mains power to cool it down before we go away in 3 days and note the fans come on intermittently for about only 20 seconds then switch off.

It seems OK to me ATM?
 #110576  by Growlerbearnz
 Fri Mar 25, 2016 11:01 pm
We have a remarkably similar setup in our caravan, except we added a switch to disable the fans- usually used at night. The fans are quiet enough during the day, but surprisingly loud when camping in the middle of nowhere! Before installing the fans keeping the fridge at 2-4C meant using the highest flame setting almost all the time, but now we're using the medium flame a lot, and sometimes even the smallest setting.

On our install we used a thermostat to save power, and because we had a few lying around in the workshop. Surprisingly, the thermostat actually works- I've noticed our fans come on more when it's hot outside or when the fridge door is being opened a lot, and less often when it's cooler. I guess the ammonia cycle is more active when there's work to do?
 #110620  by yachty
 Sun Mar 27, 2016 7:10 pm
The problem with fridges in uk caravan is usually three fold .

(1)Vents are too low, this stops air circulating past top of evaporator plates
(2)Too big an air gap between back of fridge and wall easy to remedy by inserting a upward baffle just below evaporator fins
(3) Lack of air flow, over come by installing fan mid way on back of fridge and other pushing air out top vent. Yes better to have thermostatic switching because if fan is running full time it restricts the heating of the ammonia thus efficiency of fridge.
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