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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

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Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

Outside Temperature Sensor

Outside Temperature Sensor Location:





1. Remove the temperature sensor from the windshield wiper bracket.
2. Place the sensor next to an accurate temperature gauge (thermometer) and allow enough time for the sensor and the gauge to adjust to the ambient temperature.
3. With a suitable ohmmeter, check the resistance of the sensor.
4. Compare the readings with the temperature chart. Specifications

If the resistance is not within the specified range, replace the outside temperature sensor.