TM 9-2350-247-20-1
VEHICLE COMPARTMENT HEATER MALFUNCTIONS—Continued
0085 00
3EY
1. Replace vehicle compartment heater fuel pump (WP 0448 00 or
WP 0449 00).
2. Verify no faults found.
FY
1. Remove heater control box (WP 0431 00).
2. Measure resistance between lead ends of heater control jack (1)
pin A (2) and RUN-OFF-START switch terminal 14 (3).
3. Does multimeter read 0 ohms?
YES
NO
FYN
1. Replace faulty lead (WP 0294 00).
2. Verify no faults found.
2FY
1. Replace heater RUN-OFF-START switch (WP 0472 00).
2. Verify no faults found.
GY
1. Check heater exhaust.
2. Is heater exhaust cold?
YES
NO
GYN
1. Defective flame detector switch.
2. Notify your supervisor.
0085 00-8
