Tech Tips

Heat Pump Symptoms
(1.5 - 5 ton) Cooling Mode

Freezing of Indoor Coil	High Liquid Pressure/Low Subcooling
Tripping High Pressure Switch	High Liquid Pressure/High Subcooling
Unit Running in Heat Mode	High Suction Pressure/ Low Liquid Pressure
Compressor Runs But Does Not Pump	Low Suction Pressure/ Normal Superheat (TXV)
Compressor Tries to Start But Does Not	Low Suction Pressure/High Superheat (TXV)
Freezing of Suction Line	High Suction Pressure/High Superheat
Low Suction Pressure/High Superheat	Unit Pumps Into Vacuum
Odor and/or Green Slime in Refrigeration System	High Suction Pressure/Low Superheat