Is this a bad circuit board? (fridge)
Its the type that uses the resistance probe. Which is all fine and dandy. I have not measured the ohms but assume its measuring accurately. Lets pretend the temp probe was hanging off the fins. Re...
Forum Discussion
Nv Guy wrote:The probe on the fins controlling temp is much different than an air temp thermometer telling you current air temp.wopachop wrote:
I think youre way off with #1 and #2 Doug. Thanks for helping though.
#1. The tstat runs in cycles, no? It cools until the probe reaches a resistance. Then the burning stops. Once the resistance rises to a certain level the burning starts again. Is that not a cooling cycle? Whatever you want to call it, that is the topic im hoping to discuss.
#2. I agree the air temp will vary slightly from food temp. But they are very close and in my experience you can measure air temp and get a good idea what the food temp is. To say "NOT AT ALL" is plain silly. Ive been gauging air temp right next to a bottle of water with a dial thermometer in it. Promise they are always very close. Enough to determine if your fridge is cooling properly or if youre running a bit warm come summertime.
Back when I was in the RV biz, if you called Dometic tech support and reported interior air temp rather than the temp from a container of water, they would all but hang up on you.
Air temp is unreliable - you need a thermal mass to determine actual accurate interior temp.
Why do you think the manufacturers attach the themistor to the refer fins (thermal mass) as opposed to just let it dangle in the wind?
The fin temperature is controlling what the fridge does.
The air temp is just a basic understanding of what the current temp might be. Food temp will be lagging behind.
