Tech Tips

Heat Pump Symptoms
(1.5 - 5 ton) Heating Mode

Tripping High Pressure Switch	High Liquid Pressure / High Subcooling
Unit Running in Cool Mode	High Suction Pressure / Low Liquid Pressure
Compressor Runs but Does Not Pump	Low Suction/ Low Superheat (fixed metering device)
Compressor Tries to Start But Does Not	Low Suction/ Normal Superheat (TXV)
Low Suction Pressure / High Superheat	Unit Pumps into Vacuum
Odor and/or "Green Slime" In Refrigeration System	High Suction Pressure / Low Superheat
High Liquid Pressure/ Low Subcooling	Insufficient Heat