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

Outside Air Temperature Sensor

The outside air temperature sensor provides a sample of outside air temperature. This signal is an input that tells the HVAC controller the outside air temperature. The controller uses information to adjust the inside air temperature of the vehicle.