dougrainer wrote:
Norcold and Dometic make AUTU TEMP refers. That means there is NO adjustable tstat and the temp is a constant at about 38 degrees
MOVING a Thermister on a Adjustable (Norcold 1-9 and Dometic 1-5) refer will NOT yield colder or warmer temps if wanted. The Thermister senses the temp of the fins and turns the refer ON and OFF depending on the set of the tstat(1-9). That sense is the OHMs reading. FYI, a BAD Thermister will still test(OHM READINGS) TO SPEC. Moving a Thermister on an AUTO TEMP refer can be done, but only changes the final temp no more than 4 degrees.
The FIN temp will be 10 degrees colder than the refer temp---- Fins at 24 degrees-----refer will be 34 degrees.
For another posters question about moving the Thermister on an Adjustable tstat refer. Lets say you have the Thermister in the center of the fin top to bottom(Factory setting). At 5 setting lets say 35 degrees in refer. The thermistor is sensing at 25 degrees(10 degrees). You move the Thermister UP(Fin will be colder there). The Thermister will now read 25 degrees a little sooner, but still shut off the refer at that 25 degrees.
Moving the Thermister UP will yield colder temps in a AUTO tstat refer
Doug
Doug thanks for taking the time to explain all that.
So we are all agreed that the fins are colder higher up. That is what my IR temp gun says too in my test just now. After that, Doug has managed to confuse me even worse! :)
So we have
1. AUTO Temp fridges,
2. We have Adjustable tstat fridges (using the Temp setting button)
3. AUTO tstat fridge (maybe a typo?)
With 1. you can move the thermistor and get maybe a 4 degree change to what the AUTO temp is. 38F nominal can be made to go from 36 to 40? Or is that 34 to 42?
Which way does Doug say to move it to make that 40 go to 38? Or 36 go to 38? ( The link posted earlier says move it down to make the fridge temp go from 42 to 38 so he does the 4 degrees with wider spread?)
With 2., Adjustable tstat moving the thermistor will NOT yield colder or warmer temps if wanted. BUT,
Moving the thermistor UP will get you colder temps in 3. an AUTO tstat fridge, but
If you move it UP in a 2. Adjustable tstat fridge, it will not change the fridge temp, but will make it get to the thermistor reading for shutting of the cooling (shutting off the heat source) "sooner"
To me, that "sooner" means if the cooling stops sooner, the fridge will not be as cold as if it had run on longer. That is what happens if it does not shut off--it keeps getting colder and colder in the fridge section (and in the freezer too)
So that would mean it does yield warmer fridge temp. What part of this don't I get? :(
Then Doug says with 3. (typo? ) moving the thermistor UP yields colder temps in that type of fridge.
The link guy says:
"....cooling fins to another you are effectively readjusting the resistance and “tricking” the control board. For instance, if your refrigerator is running around the 42 degree mark consistently you can move the thermistor to a location that gets cold more slowly so that the food cabinet actually drops to 38 before the control board shuts of the heat source."
He then says moving it down to the left makes the fridge colder.
I think he means by, "gets cold more slowly", that it doesn't do that, but what he is trying to say is that it will keep cooling longer so it takes more time ("slower") to reach the lower temp shut off point.
