TM 9-2320-363-20-1
PROBLEM - LITTLE OR NO AIRFLOW
Possible Cause
Remedy
The blower is not operating
Check for an open circuit breaker. An open circuit indicates a short in the
electrical system, which must be located and repaired.
Check the air conditioner relays for operation. Replace as necessary.
Make sure the blower motor switch is working. Replace if necessary.
Check the wiring to the blower motor. If any connections are loose,
securely tighten them.
Check the blower motor for operation. Replace if sticking or otherwise
inoperative.
Check the resistor block. Replace if necessary.
CAUTION: Never try to bypass the fuse in the resistor block. To do so
could cause the blower motor to overheat, resulting In serious damage to
the heater/air-conditioning system.
There are restrictions or leaks in the
Examine all air ducts and remove any blockages. Stop any leaks or
air ducts.
replace any portion where the leaks cannot be stopped.
Ice has formed on the evaporator
Defrost the evaporator coil before resuming operation of the air
coil.
conditioner.
PROBLEM - WARM AIRFLOW WHEN AIR CONDITIONER IS ON
Possible Cause
Remedy
There is no refrigerant charge in the
Perform a leak test.
system
The refrigerant compressor is not
Leak test the system.
operating.
Drive belt needs repair or replacement.
The air conditioner microswitch is
Replace the microswitch.
not working.
Ice has formed on the evaporator
Defrost the evaporator coil before resuming operation of the air
coil.
conditioner.
Change 3 3-92.7
