TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
72. CAB HEATER DOES NOT WORK WHEN SWITCH IS ON
Step 1.
Corroded or loose electrical connections at heater
control.
a. Check wiring to heater. Clean and/or tighten
electrical connections.
Step 2.
Switch failure.
a. Remove and test ON/OFF switch. If OK, do Step 3.
b. Replace ON/OFF switch. (Refer to page 8-34.)
Step 3.
Operation indicator light blown.
a. Replace lamp.
73. CAB HEATER STARTS AFTER SWITCHING ON SEVERAL TIMES
Step 1.
Fuel tank empty, fuel lines plugged.
a. Fill fuel tank. (Refer to TM 5-3810-306-10.)
b. Inspect in-line fuel filter. If clogged, replace.
(Refer to page 15-32.)
c. Check fuel lines for blockage or damage.
d. If OK, do Step 2.
Step 2.
Defective heater or fuel (dosing) pump.
a. Contact Direct Support Maintenance.
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