Error 28-36 — Indoor unit temperature sensor malfunction

What does 28-36 mean?

These codes indicate a failure of a liquid or gas temperature sensor within the indoor unit's Electronic Expansion Valve (EEV) circuit. The specific sensor is identified by the code number.

• Bad sensor connection
• Faulty sensor
• Sensor resistance drift
• Inaccurate temperature reading by PCB

Click steps to track your progress.

1. 1

   Identify the specific malfunctioning sensor using the error code.

2. 2

   Check the sensor wiring connection to the PCB.

3. 3

   Test the sensor resistance.

4. 4

   Replace the sensor if faulty or out of range.

5. 5

   If an unused port is available, temporarily use its sensor.