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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

AMBIENT TEMPERATURE SENSOR INSPECTION

1. Measure the temperature around the ambient temperature sensor.

2. Measure the resistance between terminals of the ambient temperature sensor.
- If the resistance is not as shown in the graph, replace the ambient temperature sensor.