SMC Discussion Areas

Trouble-Shooting => Refrigeration => Topic started by: brasskey on June 25, 2012, 07:46:34 pm



Title: Evaporator coils freezing/frosting - unit not cooling
Post by: brasskey on June 25, 2012, 07:46:34 pm
So I checked the drinks this morning and they were nice and cold.  Evaporator fan was running and compressor/condenser fan was off at the time.  I just got home from work and the compressor and both fans were running.  But, the drinks were not cold.  I opened up the unit and the evaporator coils are completely frosted over.  Any ideas what the problem might be?

(http://i193.photobucket.com/albums/z221/brasskey/3cdb3b2d.jpg)

(http://i193.photobucket.com/albums/z221/brasskey/bda3c8f1.jpg)

(http://i193.photobucket.com/albums/z221/brasskey/e94147b7.jpg)


Title: Re: Evaporator coils freezing/frosting - unit not cooling
Post by: johnieG on June 25, 2012, 08:50:49 pm
The Evap' coil fins are plugged with frost/ice due to an air leak letting in too much humid air, this flow of warm air forces the T-stat to keep the compressor running, then you get a film of frost over the fins & it ( bad pun warning) snowballs from there  :tounge: so shut off the T-stat, let it defrost & track down where the air leak is coming from.

Or it could be a stuck thermostat too.


Title: Re: Evaporator coils freezing/frosting - unit not cooling
Post by: brasskey on June 25, 2012, 09:11:02 pm
The Evap' coil fins are plugged with frost/ice due to an air leak letting in too much humid air, this flow of warm air forces the T-stat to keep the compressor running, then you get a film of frost over the fins & it ( bad pun warning) snowballs from there  :tounge: so shut off the T-stat, let it defrost & track down where the air leak is coming from.

Or it could be a stuck thermostat too.

I'll check the door seals to see if too much hot air is getting in.  Then I'll replace the thermostat if that doesn't' fix it.  Thanks johnie.


Title: Re: Evaporator coils freezing/frosting - unit not cooling
Post by: globalcompressors on June 26, 2012, 07:33:56 am
I like snow balls!   :biggrin: