5000S Sedan L5-2226cc 2.22L SOHC (KZ) (1985)
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Coolant Temperature Sensor / Switch HVAC: Description and Operation
Blower Fan Thermo-Switch
Purpose and Operation
A thermoswitch is also used to control the operation of the blower fan. The switch completes a ground circuit to the control head. When engine
temperature is below 104°F (40°C) the switch is open and interrupts the ground circuit. This prevents the blower fan from running when the engine is
cold and supplying uncomfortable gusts of cold air at low ambient temperatures.
If the Defrost button is pressed, this feature is overridden and the fan starts immediately.
