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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Multi-Function Thermal Sensor / Switch: Testing and Inspection

1. Remove switch and sensor from evaporator case and connect ohmmeter to switch terminals.
2. Immerse switch sensor in an ice bath solution and gradually lower temperature of solution.
3. Above 37-41 deg. F, meter should indicate continuity. Below 28-32 deg. F, meter should indicate no continuity.