Originally Posted by rocko
Just a quick question... we have a Dometic with a CC switch at top of freezer door.. The freezer works very well, but the refrigerator does not get cold. Milk is actually kind of 'warm' . When running on Propane... shld this switch be on or off? shld the slide on the fins be at the top for the coldest or the bottom? We have tried both and doesn't really make a diff where its positioned on fins.. Local Dealer said bottom is coldest?????? Someone help! Not very fond of Dometic.
You (or the dealer) misunderstood the comment.
1) The cold air is denser so it goes to the bottom of the fridge.
2) The Thermistor turns the "cold maker" on when the temperature AT the level of the thermistor gets too warm.
3) The lower the Thermistor is, the less it wants to call for coldness.
4) The higher the Thermistor is, the earlier it gets warm and the sooner it calls for "coldness."
So your dealer is correct, lower in the fridge it is "more cold" than higher (but not the answer you needed); BUT:
if the fridge is not cold enough, the Thermistor needs to be higher so the cold maker comes on sooner.
if the fridge is too cold (eggs freezing), the Thermistor needs to be lower so it does not run so much.
The FREEZER section works separately than the fridge. It gets the coldest gas and chills a large plate attached to the back of the freezer. That plate's coldness is only indirectly controlled by the Thermistor. Since it gets first call on "coldness" and "full cold" is the desired state, there is no "warmer" setting.
The temperature in the freezer depends way more on the efficiency of the system and less on the setting of the Thermistor.
To keep the freezer at its coldest:
1) Never open the freezer unless you know exactly what you are going in there for; get it and close the door.
2) Run the fridge on propane and not electric as the propane is a more efficient boiler of ammonia than the AC heating element.
3) SHADE the fridge vent inlet. Cooler air entering at the bottom will cool the hot ammonia gas quicker and more completely than hotter air.
4) VOLUME - Add fans to the coil vent system to increase the volume of cooling air across the coils.