TROUBLESHOOTING CHART — HEATING
REFRIGERANT SYSTEM DIAGNOSIS – HEATING
Low Suction Pressure | High Suction Pressure | Low Head Pressure | High Head Pressure | |
Low Airflow | Outdoor Ambient Too High | Refrigerant | System | Outdoor Ambient Too High |
Across Outdoor Coil | for Operation in Heating | Restriction | For Operation In Heating | |
Refrigerant System | Reversing Valve not | Reversing Valve not | Low Airflow Across | |
Restriction | Fully Seated | Fully Seated | Indoor Coil | |
Undercharged | Overcharged | Undercharged | Overcharged | |
Moisture in System | Defective Compressor | Defective Compressor | Noncondensables (air) | |
ELECTRICAL TROUBLESHOOTING CHART — HEAT PUMP
HEAT PUMP
SYSTEM COOLS WHEN
HEATING IS DESIRED.
Is Line Voltage |
| Is the Selector Switch |
Present at the Solenoid | NO | Set for Heat? |
|
| |
YES |
|
|
Is the Solenoid Coil Good? | NO | Replace the Solenoid Coil |
|
| |
YES |
|
|
Reversing Valve Stuck |
|
|
Replace the Reversing Valve
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