Originally Posted by Kahoona
I am wondering if high humidity reduces cooling in an evaporation fridge? I can't see that it would if the same flame goes up the same flue and the seals are tight but yet there it is.
Humidity does not seem to affect our Norcold 1210 cooling at all. Our fridge is in a slide.
Next question is does a frosted freezer keep the fridge from cooling?
Not on ours nor does it affect the freezer temps. I keep a wireless temp sensor in one freezer compartment and the fridge so, yes, I am certain.
Why do some people's evaporative fridges get warm while we are driving? Ours sometimes does but it cools right down when we stop.
Ours used to do that. The fridge and freezer would go up maybe five degrees while driving. As soon as we stopped at a rest area down the temps came.
The factory seriously messed up the installation and the dealer made some partial fixes. We went back to the factory and the fridge was pulled. A fellow from Norcold supervised the reinstallation and the factory had their fridge installers attend so they could see what their shortcuts were doing.
Now that the fridge in a slide is installed completely in accordance with the manual it actually gets cooler when driving. The freezer can be around 3 or 4 degrees when we start out and will go down to -1 or -2. The fridge will go from 36-37 down to 32-33.
If you have a roof vent, which we do not, I'd think your problem is that air is being pushed into the roof vent and affecting the upward air flow.
I did purchase an ARP Fridge Defend with the four extra fans but have not fully installed it. The ARP device is installed except for the part that actually monitors the boiler tube temperature.
So all it's doing is controlling the extra fans.
I put their two small (maybe 2") interior fans inside on the fridge ceiling and they get pointed at the cooling fins. The fans take warmer air at the top of the fridge and blows it against the fins to circulate air in the fridge and also to keep the fins frost-free. Those interior fans definitely help the fridge cool down faster after food is added. Previously, adding six water bottles as fast as I could would push the fridge to 42 to 45. Now adding a dozen may affect the temperature one degree. (I keep the wireless temp sensor on the top shelf.)
I installed one of the ARP exterior fans on the lower fridge vent door (the air inlet) to pull air in and push it up. It turns on and off with the cooling unit. I now have a very nice breeze coming out the top vent whereas before it was just a very light breeze.
With the temps in the high 80's or low 90's and direct afternoon sun on the slide with the fridge I now need to run the fridge at a setting of "2", which is the second warmest setting, to keep the fridge above freezing.
So, for us, it was all about proper venting on the outside and air circulation on the inside.