Forum Discussion
dougrainer
May 10, 2015Nomad
1. Except for about 2 models of RV refers (1 Dometic and 1 Norcold that have defrost HEATERS), there is NO REAL defrost on Absorbsion RV refers.
2. Certain models of Norcold including the 1200 4 door series have what they call a "defrost mode". That just means, IF the refer is on continuously, every 48 to 54 hours the refer auto shuts OFF for 2 hours. During that 2 hours, this gives the EVAP coils time to melt the ice build up and drain to the rear drain cp.
3. ICE on the evap fins is NORMAL. The refer, the fins are 10 degrees colder than the interior temp of the refer. So if your refer interior temp is 36 degrees the fins will be about 24 to 26 degrees which means any humidity/condensation will form as ICE on the fins.
4. ANY ICE build up restricts the cold capacity of the refer. So, keeping the evap fins as ice free as possible makes the refer operate better and colder.
5. To defrost the ice on the fins, turn the refer off and use a fan to blow on the evap fins until the ice is gone. BOTH Norcold and Dometic advise to NOT use a hair dryer or heat gun to defrost the fins as that heat may damage the plastic interior of the refer. Doug
2. Certain models of Norcold including the 1200 4 door series have what they call a "defrost mode". That just means, IF the refer is on continuously, every 48 to 54 hours the refer auto shuts OFF for 2 hours. During that 2 hours, this gives the EVAP coils time to melt the ice build up and drain to the rear drain cp.
3. ICE on the evap fins is NORMAL. The refer, the fins are 10 degrees colder than the interior temp of the refer. So if your refer interior temp is 36 degrees the fins will be about 24 to 26 degrees which means any humidity/condensation will form as ICE on the fins.
4. ANY ICE build up restricts the cold capacity of the refer. So, keeping the evap fins as ice free as possible makes the refer operate better and colder.
5. To defrost the ice on the fins, turn the refer off and use a fan to blow on the evap fins until the ice is gone. BOTH Norcold and Dometic advise to NOT use a hair dryer or heat gun to defrost the fins as that heat may damage the plastic interior of the refer. Doug
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