TM 9-2350-247-20-1
VEHICLE COMPARTMENT HEATER MALFUNCTIONS—Continued
0085 00
4Y
1. Move RUN-OFF-START switch to RUN. Do not stop at OFF
position.
2. Does blower and pump stay on?
YES
NO
4YN
1. Replace heater RUN-OFF- START
switch. See task: Repair heater
control box (WP 0472 00).
2. Verify no faults found.
5Y
1. Check how long heater produce hot air.
2. Does heater continue producing hot air for ten minutes?
YES
NO
5YN
1. Heater shuts off prematurely. See
TM 9-2540-205-24&P.
6Y
1. Listen to heater blower.
2. Turn HI-LO switch to HI.
3. Does blower speed increase?
YES
NO
GO TO FY (PAGE 0085 00-8)
7Y
1. Feel heater hot air outlet.
2. Has air temperature increased?
YES
NO
7YN
1. Shut off heater (see your -10).
2. Faulty heater restrictor solenoid. See
TM 9-2540-205-24&P.
8Y
NOTE
Heater shuts off prematurely if air inlet temperature is 60
degrees or above. This is normal.
1. Run heater on HI for ten minutes.
2. Does heater continue producing hot air?
YES
NO
8YN
1. Shut off heater (see your -10).
2. Insufficient heater operation. See
TM 9-2540-205-24&P.
9Y
1. Turn RUN-OFF-START switch to OFF.
2. Does blower remain on?
YES
NO
9YN
1. Heater does not purge. See TM
9-2540-205-24&P.
0085 00-2
