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Evaporator Temperature Sensor / Switch > < Understanding Track Style Wiring Diagrams, Important Stuff !|Page 510

5000CS Turbo L5-2226cc 2.22L SOHC Turbo (MC) (1987)

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Coolant Temperature Sensor / Switch HVAC: Description and Operation

Coolant Overheat Switch

Purpose and Operation

The coolant overheat switch is incorporated in the electronic thermoswitch which is located on the cylinder head coolant flange. If the engine coolant
exceeds 247°F (120°C), terminal R of the thermo-switch will send a ground signal to terminal 20 of the control panel head.

The control panel head will then turn the A/C compressor off via the programmer. This will help lower coolant temperature by reducing the engine
load.

Evaporator Temperature Sensor / Switch > < Understanding Track Style Wiring Diagrams, Important Stuff !|Page 510