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PROBLEM
TO CORRECT
Refer to the heating data on applicable models for
the preselected temperature the compressor shuts
off and the electric element is energized.
POSSIBLE CAUSE
Outdoor thermostat.
(Applicable models.)
Compressor will not
turn off and operate on
heating element only
during low outside
ambients.
Troubleshooting Chart — Cooling
Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure
Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions
Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across
Indoor Coil Indoor Coil Restriction Outdoor Coil
Refrigerant System Reversing Valve not Reversing Valve not Overcharged
Restriction Fully Seated Fully Seated
Undercharged Overcharged Undercharged Noncondensables (air)
in System
Moisture in System Defective Compressor Defective Compressor
REFRIGERANT SYSTEM
DIAGNOSIS COOLING