Heating, Ventilation, and Air Conditioning

Air Conditioning Pressure Sensor Description and Operation

~1min read

Description

The Air Conditioning Pressure Sensor (APT) measures the high-pressure line pressure and converts it into a voltage signal. The engine ECM converts the voltage value to control the cooling fan, operating it at high or low speed. The engine ECM stops compressor operation when the refrigerant line temperature is excessively high or abnormally low, to optimize the air conditioning system.

Test yourself

A quick Kia Soul EV Owner's Manual quiz: every answer comes with an explanation and a link to the manual page.