Specifications

11
TROUBLESHOOTING INFORMATION
Problem
No Cooling/Heating Cause/Test Method and/or Solution
■ System will not start. ■ Power failure. Test voltage.
■ Blown fuse. Inspect fuse size and type. Replace, if needed.
■ Loose connection. Inspect connection. Tighten if needed.
■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Faulty thermostat. Test continuity of thermostat and wiring. Replace, if needed.
■ Faulty transformer. Check control circuit with voltmeter. Replace, if needed.
■ Compressor will not start—fan runs. ■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Shorted or open capacitor. Test capacitor.
■ Internal compressor overload open. Test continuity of overload.
■ Shorted or grounded compressor. Test motor windings.
■ Compressor stuck. Use test cord.
■ Low voltage. Test voltage.
■ Compressor and condenser fan will
not start.
■ Blown fuse. Inspect fuse size and type. Replace, if needed.
■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Faulty thermostat. Test continuity of thermostat and wiring. Replace, if needed.
■ Faulty transformer. Check control circuit with voltmeter. Replace, if needed.
■ Faulty compressor contactor. Test continuity of coil and contacts. Replace, if needed.
■ Evaporator fan will not start. ■ Blown fuse. Inspect fuse size and type. Replace, if needed.
■ Loose connection. Inspect connection. Tighten if needed.
■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Open fan overload. Test continuity of overloads.
■ Faulty thermostat. Test continuity of thermostat and wiring. Replace, if needed.
■ Shorted or open capacitor. Test capacitor.
■ Faulty fan relay. Test continuity of coil and contacts.
■ Open control circuit. Test control circuit with voltmeter.
■ Faulty evaporator fan motor. Repair or replace.
■ Condenser fan will not start. ■ Shorted or broken wires. Test circuits with ohmmeter. Replace if needed.
■ Open fan overload. Test continuity of overloads.
■ Shorted or open capacitor. Test capacitor.
■ Faulty compressor contactor. Test continuity of coil and contacts. Replace, if needed.
■ Shorted or grounded fan motor. Test motor windings.
■ Faulty defrost control. Test control.