9
VII. SERVICE PROBLEMS AND THEIR
POSSIBLE SOLUTIONS
SERVICE PROBLEMS WITH AIR CONDITIONER
AND FREE DELIVERY CEILING ASSEMBLIES
The following list of service problems covers only some of the more common problems which may occur and lists only the
more probable causes. In many instances, it will be necessary to use the wiring diagram in this manual to check out the
electrical circuits step by step, starting at the power source.
PROBLEMS
POSSIBLE CAUSES
(REFER TO THE INDIVIDUAL COMPONENT
CHECKOUT PROCEDURES)
Nothing Runs, No Compressor, No Fan, No Heat No A/C Voltage, Selector Switch
Fan Runs, No Compressor Operation in the Cooling Mode
Insufficient Voltage to the Unit, Wiring, Thermostat, Start
Capacitor, Run Capacitor, Start Relay, Open Overload,
Selector Switch, Compressor
Heat or Compressor Runs, No Fan Operation Wiring, Selector Switch, Fan Capacitor, Fan Motor
Fan Runs, No Electric Heat Element
Wiring, Thermostat, Selector Switch, Limit Switch, Outdoor
Thermostat, Heating Element
Compressor Runs, Fan Runs, Insufficient Heat
Air Flow Restrictions, Outdoor Thermostat May Open Due to
Low Ambient Temperature, (Undersized) Too Much Heat
Loss in the Vehicle, Refrigeration System, Very Little or No
Refrigerant Charge, Compressor
Compressor Runs, Fan Runs, Insufficient Cooling
Air Flow Restrictions, High Ambient Temperature,
(Undersized) Too Much Heat Gain to the Vehicle, Refrigerant
System, Very Little or No Refrigerant Charge, Compressor.
(IF YOU HAVE NOT BEEN PROPERLY TRAINED IN
REFRIGERATION SEALED SYSTEM REPAIRS, DO
NOT ATTEMPT TO BREAK INTO THE SYSTEM.)
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