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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (HVAC Climate Control System - General Information And Diagnostics - (Hybrid)) >> Description And Operation >> Climate Control System >> Humidity Sensor >> Notes

Humidity Sensor: Notes

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The humidity sensor is used by the HVAC module to optimize the A/C compressor cycling for fuel economy while maintaining passenger comfort.

When the relative humidity inside the vehicle is low, passengers are comfortable at a higher air temperature. The A/C compressor can be shut down before the commanded temperature is reached to increase fuel economy while maintaining passenger comfort.