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

Electrical Diagrams

HVAC Schematics

Power, Ground, Controls, and Serial Data

Temperature, Air Quality, Ambient Light and Sunload Sensors

Heater Coolant Pump (LUK)

Blower Motor Controls

A/C Compressor Controls

Air Delivery and Temperature Controls