A/C Compressor Control Module InternalTemperature Sensor A Circuit Intermittent/Erratic

Common symptoms

What you'll notice

• Check the internal temperature sensor wiring for any loose or damaged connections.
• Inspect the A/C compressor control module for any signs of damage or malfunction.
• Clear the stored faults.
• Replace the internal temperature sensor if it is determined to be faulty.
• Replace the A/C compressor control module if all other solutions are unsuccessful.

Common causes

Most likely first

1. Faulty A/C compressor control module internal temperature sensor
2. Loose or damaged wiring connecting the temperature sensor to the control module
3. Malfunctioning A/C compressor control module
4. Issues with the vehicle's electrical system or power supply to the control module
5. Sensor or module communication failure

How to diagnose & fix

Work through it in order

1. A/C system may not function properly or may not turn on at all
2. A/C may blow only hot air or erratic temperatures
3. A/C compressor may fail or continuously cycle on and off
4. A/C system may display error codes or warning lights on the dashboard
5. A/C system may produce strange noises or vibrations