Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Evaporator Temperature Sensor / Switch: Specifications

When the fin sensing cycling clutch switch sees a temperature input below about 1.6° C (35° F), it signals the PCM to cycle the compressor OFF.

When the temperature input reaches above about 3.9° C (39° F), the switch signals the PCM to cycle the compressor back ON.