TM 9-2350-247-10TROUBLESHOOTING TABLE—Continued 0056 00INITIAL SETUP:Maintenance LevelOperatorVEHICLE COMPARTMENT HEATER KITNOTEA vehicle compartment heater kit is optional in the M548A1 carriers. M548A3 carriers have avehicle compartment heater installed.Table 15. Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION1. HEATER DOES NOT STARTWITH THE RUN-OFF-STARTSWITCH HELD IN STARTPOSITION.1. Check if MASTER SWITCH isOFF.Turn MASTER SWITCH ON.2. Defective heater.Notify unit maintenance.2. HEATER OVERHEATS ANDSTOPS.1. Check if the heater air intake,exhaust pipe or warm air outlet isblocked.Find and remove whatever is blockingthe heater system.3. HEATER OVERHEATS ANDDOESN’T STOP.1. The heater is no good.Turn the heater OFF and don’t use ituntil unit maintenance fixes it.4. HEATER DOES NOT PUT OUTENOUGH HEAT.1. Check if HI-LO switch is in LOposition.Move HI-LO switch to HI position(WP 0031 00).0056 00-31/32 blank
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