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 thermo switch.
2. Dip temperature sensor of switch in cold water.
3. Slowly raise water temperature, ensuring that switch shows continuity below 31-35 degrees F and does not show continuity above 38-42 degrees F.