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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Control Module HVAC: Testing and Inspection

1. Remove the A/C amplifier.
2. Connect battery positive voltage to terminal A and ground to terminal C of the A/C amplifier.
3. Connect a test light (12 V, 3 - 18 W) between terminals A and B of the A/C amplifier.

4. Immerse the sensor part of the A/C amplifier in a container of ice water.
5. Verify that the test light condition is as shown.
6. If not as specified, replace the A/C amplifier.