AIR CONDITIONING SYSTEM TROUBLESHOOTING AND TESTING - CONTINUED
AIR CONDITIONING SYSTEM TROUBLESHOOTING - CONTINUED
Table 4. Problem - Quick or Delayed Cycling of Compressor.
Table 5. Problem - Temperature in Cab Too Low or No Heat.
Table 6. Problem - Condensed Water Is Leaking from Air Conditioner.
Thermostatic switch operates, but is out of
Replace thermostatic switch. Do not attempt to adjust it.
Loss of refrigerant is causing a delayed
cycling of compressor.
Perform air conditioner leak test (WP 0225 00).
Water regulating valve is not open.
Slide temperature lever slide control toward warm.
Water regulating valve is not opening
Adjust water regulating valve cable.
Water regulating valve is not working.
Replace water regulating valve.
Heater hose is pinched or twisted.
Repair or replace heater hose.
Coolant is leaking from system.
Check for leakage at heater core and at all hose connections from heater core to
engine. Check radiator coolant level and add coolant if necessary (TM 9-2320-302-
10). Check and repair any leaks at the radiator.
Dust or dirt is clogging heater core fins.
Remove and clean heater core.
Drain tubes are plugged.
Clean drain holes and drain tubes.