Quote:
Originally Posted by rick-l
maybe the defrost cycle is what that switch provides
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You are correct, in an odd way. Once the T-stat's capillary sensor declines to 24dF(worse case) the compressor clutch circuit opens and is not closed again until the sensor temperature rises to 35dF (best case). But then if we allow for a slight "coasting" period due to previously "stored" liquid refrigerant in the R/D the sensor area is still likely to decline another degree or more until the "store" is exhausted.
So if the evaporator core was tending toward freeze up, frost, rime ice, formation it would thaw during the compressor off period.
My problem is that the average control temperature would be sub-freezing and in a highly humid environment as is often encountered in the mid-south, south, a freeze up seems a virtual certainty. Especially so should the blower speed be reduced to moderate the cooling level rather than FIRST turning the T-stat control CCW.
Plus the above, 24dF T-stat control limit, does not account for the level of sub-freezing vent temperatures being reported.