Civic L4-1590cc 1.6L SOHC (VTEC) (1992)
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Ambient Temperature Sensor / Switch HVAC: Testing and Inspection
A/C Thermo Switch
Dip A/C thermo switch into a pan filled with ice water, and check for continuity between the terminals.
Cut off: 1.5--O.5°C (35-33°F)
Cut in: 2.5-5°C (36-41°F)
If cut off or cut in temperature is too low or too high, replace the thermo switch.