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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Ventilation Switch: Testing and Inspection

1. Remove the solar ventilation switch.

2. Check for continuity between the terminals of the solar ventilation switch by using an ohmmeter.
3. If not as specified, replace the solar ventilation switch.