HEATER BLOWS COLD AIR.

TM9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

77. HEATER BLOWS COLD AIR.

Step 1.

Start engine and bring to operating temperature (TM 9-2320-270-10).

If engine does not reach operating temperature, go to ENGINE DOES

NOT REACH NORMAL OPERATING TEMPERATURE (page 3-37).

Step 2.

Go to Cab. Pull heat knob (1) to ON position.

If knob will not pull, go to step 5.

Step 3.

Open left side of hood and remove left side panel (TM 9-2320-270-10). Check

two hoses (2) from engine (3) to heater (4) for damage or leaks, (page 4-1)

then put heat knob in OFF position and shut down engine (TM 9-2320-270-10).

If hoses are damaged or leaking, replace or repair hoses

(page 4-1293).

TA239790

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