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)

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Triple Pressure Switch

A/C Triple Pressure Switch (A/T)
Low and high switch operation is the same as the dual pressure switch. The medium pressure switch will close when system pressure exceeds 1471.5 ± 98.1 kPa (213.3 ± 14.2 psi), turning on the condenser fan.