Norcold 1200 Fins Frosting

Sooner Schooner wrote:
Your thermister may be bad. It is clipped to one of your fins and you should have a wire running to your light. I replaced mine and all is good again. Easy to do yourself, mine cost about $23.00 I believe.

Explain how a new Thermister will stop fin icing/frosting. Doug

Your thermister may be bad. It is clipped to one of your fins and you should have a wire running to your light. I replaced mine and all is good again. Easy to do yourself, mine cost about $23.00 I believe.

I use a fan like this, which is available from several different online sources, and this helps minimize my fin frost build-up, especially in high humidity areas. I also spray the fins with a non-stick cooking spray which seems to prevent the frost from sticking to the fins. Not unusual now for us to take a four month trip and not have to defrost the fins.

Thanks Doug

Good explanation Doug, thanks

In addition to what Doug said, in high humidity, the fins will ice/frost more often....Dennis

Frost build up is NORMAL on RV absorbsion refers. The fin temp will be 10 degrees COLDER than the temp of items in the refer----25 degree fin temp--35 degree temp in the refer of the items. Your model has a 48 to 54 hour defrost timer ONLY if left ON continuously. If you turn it off and on again before that 48 to 54 cycle the timer starts over. You do NOT have any defrost button, NO refer (RV) has a Defrost button. The defrost time just shuts the refer OFF for about 2 hours to let the fins melt any ice/frost and then it starts up again. Ice/Frost on the fins just indicates that there is humidity in the air. Make sure you backside drain line for the evap pan has the check valve in it to prevent moist(humid) air migration back up into the refer. Doug

Auto defrost cycle probably not working. Check to see that the switch is not turned off. Hard to find if your not short - top right of freezer door,