In-Vehicle Humidity Sensor

The in-vehicle humidity sensor contains a thermistor and a sensing element which measures the in-vehicle humidity and sends those readings to the HVAC control module. The in-vehicle humidity sensor has an electric fan within the sensor that draws in-vehicle air across the sensing elements. The HVAC control module adjusts the air inlet door depending on the humidity measured by the in-vehicle humidity sensor. If the vehicle cabin becomes too humid the HVAC control module adjusts the air inlet door to allow more fresh air. When the humidity level drops, it adjusts back to recirculated air.