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

Refrigerant Pressure Sensor / Switch: Testing and Inspection

1. With ignition off, install manifold gauge set.
2. High pressure reading should be above 33 psi (65 psi on 323). If not, inspect refrigerant system. If correct, go to next step.
3. Disconnect pressure switch connector and check continuity. Continuity should exist between terminals A and B. If not, replace switch.