What do I do with my ACTUAL superheat or ACTUAL subcooling measurements?
Compare actual readings against the target superheat/subcooling as determined by the system manufacturer’s specifications. These charts are supplied with the equipment. As a general rule, if superheat is too high, add refrigerant. If too low, remove refrigerant. If subcooling is too high, remove refrigerant. If subcooling is too low, add refrigerant. Consult the manufacturer’s specifications before adding or recovering refrigerant, as further diagnostic tests may need to be performed.
