EVAPORATOR FAN, MOTOR, AND HOUSING.

TM5-4120-383-14

EVAPORATOR FAN, MOTOR, AND HOUSING.

4-33.

The evaporator fan, motor, and housing are located behind the

return air louver assembly.

Disconnect input power from the air conditioner

before performing maintenance on any part of the

The voltages used can be lethal.

electrical system.

Inspect/Service.

(1) Disconnect power at power source.

(2) Remove return air louver assembly (para 4-13).

(3) Check that all parts are in place and in good condition.

(4) Inspect fan for damaged or bent blades and the motor for

signs of overheating. Check all mounting hardware for tightness.

(5) Disconnect P3 motor connector plug and check for loose,

damaged, or missing pins.

(6) Inspect fan housing for damage and missing or defective

hardware.

(7) Wipe or vacuum all dust or dirt from fan, motor, and

housing.

(8) Repair of fan and housing is by replacement.

Test.

(1) The motor is capable of operating at two speeds.

Therefore there are two sets of field coils.

(2) Use an ohmmeter or continuity tester to check continuity

Continuity

between pins A and B, A and C, D and E, and E and F.

If continuity does not exist allow motor to cool and

should exist.

If continuity still does not exist replace motor.

retest.

(3) Check continuity from pin G to pins A, B, C, D, E,

and F. Continuity should not exist.

4-90