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
The Climate Control Switches Do Not Work
The climate control switches do not workProbable cause: Climate control switch communication line circuit malfunctioned.
Do the HVAC switch communication line circuit troubleshooting
HVAC Switch Communication Line Circuit Troubleshooting.
Also check for
Climate control DTCs
Initial Inspection and Diagnostic OverviewAlso check for
Poor or loose connections at the terminals