102
TROUBLESHOOTING
Troubleshooting Heat Pump - No Cool
No
Yes
No Cool
No
No
Yes
No
Compressor
Running
Repair or Replace Wiring
Replace Capacitor
Check for Stuck Compressor
Check Refrigerant Charge and
Amp Draw
Replace Compressor
Yes
Replace Contactor
Yes
No
Repair or Replace Metering
Device
Metering Device
Working Properly
No
Check Thermostat and
Thermostat Wires
Check control board no voltage
out of board replace board
No
Replace Indoor Motor
Contactor
Open
Wiring to
Compressor
OK
Yes
Run Capacitor
Good
Compressor
Overload
Open
Compressor
Windings
Open
Replace Compressor
Compressor
Warm to
Touch
Did Compressor
Restart After
Allowing to Cool
Yes
Replace Compressor
230 Volts to
Unit
Check Breakers or Fuses
Yes
230 Volts to
Transformer
Check Wiring from Contractor to
Transformer
Yes
24 Volts from
Transformer
Yes
24 Volts on Y
from
Thermostat
Yes
24 Volts to
Contactor Coil
Yes
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Check Pressure Switches and
Wiring
Check Thermostat and
Thermostat Wiring
Replace Transformer
Compressor
Pumping
Yes
Replace Compressor
Yes
Indoor Blower
Runnng
No
No
Voltage to
Indoor Motor
Yes
24 Volts on G
from
Thermostat
Yes
No
Reversing
valve stuck
between heat
and cool
Yes
Replace Reversing Valve
Yes
No
Reversing
Valve in Cool
Mode
24 Volts to
Reversing Valve
Reversing
Valve
Solenoid Coil
Good
Yes
Reversing
Valve Piped
Correctly
Yes
No
No
No
No
24 Volts on O
from Thermostat
Thermostat in
Cool Mode
Yes
Yes
Yes
Check thermostat for proper
setting anf function
Check Thermostat and
Thermostat Wires
Check Internal Wiring to
Reversing Valve
Replace Reversing Valve
Solenoid
Replace Reversing Valve
Install Reversing Valve Correctly
No
HEAT PUMP - NO COOL
