TIAGO

HVAC 23 10.1.5.5. THERMISTOR OR THERMO SENSOR It is a temperature sensing device, which is posi- tioned at the coldest point of the evaporator (as shown in the fig below) . The control unit switches OFF the compressor at a temperature when con- densed water tends to form ice on the fins of evaporator. Thus it maintains the evaporator tem- perature within a specified range. LOCATION It is mounted on Air intake / Evaporator housing assy PIN OUT PIN DETAILS PIN NO DESCRIPTION 01 Temperature out to control panel 02 Ground NOTE  Refer Thermistor / Thermo sensor removal and installation process from On Vehicle repairs. ON VEHICLE INSPECTION (WITHOUT DISMAN- TLING HVAC UNIT) Since the thermistor is mounted inside HVAC unit to conduct the above test HVAC unit has to be disman- tled. Alternatively following test can be conducted 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 connection. 4. Measure the resistance it should match to the ambient temperature. Refer graph in Inspection topic. 5. As given in the graph above (~ 5 Ohms or less for ambient temperature of 25ºC and above).