TM 5-3805-292-23
0006
CHASSIS TROUBLESHOOTING - INSUFFICIENT/NO HEAT IN CAB CONTINUED
AG
Remove cab floor plate (TM 5-3805-292-10).
With heat on high, run engine until normal
operating temperature is reached
(TM 5-3805-292-10).
Warm?
With engine running, ensure heater hose
coming from electric water valve assembly is
warm on heater core side.
YES
NO
Heater core or hose is plugged. Unplug
With engine running, ensure heater
or replace heater core
hose coming from heater shut-off
Warm?
NO
valve is warm on heater core side.
(WP 0130) or hose(s) (WP 0100).
YES
Replace thermostat (WP 0047).
Shut down engine (TM 5-3805-292-10).
Disconnect electric water valve
assembly (WP 0100).
Push power button to turn on machine
Voltage
Perform Open Harness Test for
power (TM 5-3805-292-10).
NO
present?
circuit 001 (WP 0173).
Measure voltage between electric
water valve assembly connector HVC2-
A, circuit 001C (R), harness side, and
YES
AH
CONTINUED