View single post by AccApp
 Posted: Thu Jun 22nd, 2006 01:39 pm
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Joined: Sat Jun 3rd, 2006
Location: Eatontown, New Jersey USA
Posts: 1788
Don't bother looking for a defrost system in the ref side of a Sub-Zero. It is referred to as "off-cycle defrost". Yes, during normal operation the ref evap may collect some frost/ice as it is at 20°-25° but when the compressor turns off the compartment temp is above freezing and the ice melts.

The ice is building up on this unit because the cold control is calling for cooling but the system is too weak to satisfy it. Thus, the compressor runs continuously but can only cool a small portion of the evap (frost pattern). Since there is no off-cycle the ice remains.

"When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle.