200 Quattro Wagon L5-2226cc 2.22L SOHC Turbo (MC) (1989)
Evaporator Temperature Sensor / Switch: Description and Operation
Heater/Evaporator Assembly
A Thermostatic switch cycles the A/C compressor clutch to keep the evaporator from freezing. The thermostat switch capillary tube is inserted into the
evaporator housing. If evaporator temperature falls below 32°F (0°C) the thermostat switch opens, A/C compressor clutch relay opens to disengage A/C
compressor clutch. This regulates the evaporator temperature between 30° to 40°.
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Switch opens:
-1.5°C to + 1.5°C (28°F to 35°F).
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Switch closes:
+1.5°C to + 4.5°C (35°F to 40°F).
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Switch opening and closing points must occur with at least 2°C (3.6°F) difference.