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Whirlpool WHP43 Installation Instructions Manual page 12

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Problem
No Cooling/Heating
Compressor runs—goes off on
overload.
Compressor cycles on overload.
Unsatisfactory Cooling/Heating
System runs continuously—little
cooling/heating.
12
Cause/Test Method and/or Solution
Loose connection. Inspect connection. Tighten if needed.
Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
Shorted or open capacitor. Test capacitor.
Shorted or grounded compressor. Test motor windings.
Compressor stuck. Use test cord.
Faulty compressor contactor. Test continuity of coil and contacts. Replace, if needed.
Low voltage. Test voltage.
Overcharge of refrigerant. Recover part of charge.
Dirty outdoor coil. Inspect coil and clean, if needed.
Improperly located thermostat. Relocate thermostat.
Wrong type of expansion valve. Replace valve.
Expansion valve restricted. Remove restriction or replace valve.
Undersized expansion valve. Replace valve.
Inoperative expansion valve. Check valve operation. Replace if needed.
Faulty reversing valve. Replace valve or solenoid.
Shorted or open capacitor. Test capacitor.
Compressor stuck. Use test cord.
Low voltage. Test voltage.
Improper cooling anticipator. Check resistance of anticipator.
Shortage of refrigerant. Test for leaks. Add refrigerant.
Restricted liquid line. Replace restricted part.
Overcharge of refrigerant. Recover part of charge.
Dirty outdoor coil. Inspect coil and clean, if needed.
Noncondensibles. Recover charge. Evacuate and recharge.
Recirculation of condensing air. Remove obstruction to airflow.
Wrong type of expansion valve. Replace valve.
Expansion valve restricted. Remove restriction or replace valve.
Undersized expansion valve. Replace valve.
Shortage of refrigerant. Test for leaks. Add refrigerant.
Restricted liquid line. Replace restricted part.
Open element or limit on electric heater (heating only). Test heater element and
controls.
Dirty air filter. Inspect filter; clean or replace as needed.
Dirty indoor coil. Inspect coil and clean, if needed.
Not enough air across indoor coil. Check blower speed. Check duct static pressure and
filter.
Infiltration of outdoor air. Check windows, doors, vent fans, etc.
System undersized. Refigure cooling load.
Broken valves. Test compressor efficiency.
Inefficient compressor. Test compressor efficiency.
Wrong type of expansion valve. Replace valve.
Expansion valve restricted. Remove restriction or replace valve.
Oversized expansion valve. Replace valve.
Undersized expansion valve. Replace valve.
Inoperative expansion valve. Check valve operation. Replace if needed.
Flowrator not seating properly. Check flowrator and seat, or replace flowrator.

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