Originally posted by airworx
subcooling is used to check the charge on any expansion valve system. type of refrigerant has nothing to due with it. subcooling tells you how much refrigerant is in the system. if charge is low subcooling will be low if charge is high subcooling will be high.
Hi Airworx: Would you mind explaining to me how tech's check the subcooling.

Thanx--Thorton