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Problem Possible Cause Possible Solution
Possible Solution
Possible Solution
Possible Solution
Fan motor does
not run.
Defective switch (On-Off) Check continuity across terminals 2 and 3.
Fan capacitor open. Test with capacitor analyzer. Replace if bad.
Inoperative fan motor.
Check power and if okay, perform continuity test.
Replace if bad.
Incorrect wiring of fan circuit. Connect per wiring diagram.
Solid state relay open. Replace relay.
Seized motor bearings. Replace motor.
Bound fan blade or blower wheel. Adjust for proper clearance.
Problem Possible Cause
Switch (On-Off)
does not cut fan
motor off.
Defective (On-Off) switch or
defective relay.
Replace switch or relay.
Problem Possible Cause
Noisy and/or
vibration.
Poor installation.
Refer to installation instructions for proper
installation.
Fan blade striking chassis or
blower wheel housing.
Adjust fan blade or blower wheel clearance.
Compressor vibrating.
Check for deteriorated compressor grommets.
Replace as needed.
Loose cabinet parts, improperly
mounted components, tubing
rubbing.
Adjust and tighten as required.
Problem Possible Cause
Water leaks into
room.
Evaporator drain pan overflowing. Clean obstructed drain trough.
Condensation forming on bottom of
base pan.
Evaporator drain pan broken or cracked. Replace
chassis seal gasket missing or defective.
Water dripping from discharge air
grilles.
Dirty evaporator coil, or extremely high humidity
conditions. Clean coil or check application.
Problem Possible Cause
Excessive water
leaks outside.
Extremely high humid conditions. Install 01900-235 drain kit.
Water in center section of base pan
(compressor area).
Drain trough. Check level. Ensure 1/4” tilt toward
rear.
Dirty condenser coil. Clean with steam or detergent.
Fan blade and slinger ring
improperly positioned.
Adjust fan blade to 1/2” clearance from condenser
coil.
TROUBLESHOOTING
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