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Troubleshooting Chart — Heating
Moisture in System
Defective Compressor
Defective Compressor
Non-condensables (air) in
System
Undercharged
Overcharged
Undercharged
Overcharged
Refrigerant System
Restriction
Reversing Valve not
Fully Seated
Low Airflow Across
Indoor Coil
Low Airflow
Across Outdoor Coil
Outdoor Ambient Too High
for Operation in Heating
Refrigerant System
Restriction
Outdoor Ambient Too High
For Operation In Heating
Low Suction Pressure
High Suction Pressure
Low Head Pressure
High Head Pressure
REFRIGERANT SYSTEM
DIAGNOSIS – HEATING
Reversing Valve not
Fully Seated
