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HVAC
20
11.
ON VEHICLE INSPECTION
(WITHOUT DIS-
MANTLING HVAC UNIT)
Since the thermistor is mounted inside HVAC unit
to conduct the above test HVAC unit has to be
dismantled. Alternatively following test can be con-
ducted without dismantling the HVAC unit:
1. Switch OFF the HVAC unit and allow the
HVAC unit to come to ambient temperature.
2. Open the glow box & lowering Glove box lid.
3. Disconnect the Pigtail connections
4. Measure the resistance it should match to the
ambient temperature. Refer graph in Inspec-
tion topic.
As given in the graph above
(~ 5 Ohms or less for
ambient temperature of 25ºC and above)