H9 — Faulty suction air temperature sensor

What does H9 mean?

This code is similar to C9 and indicates an issue with the sensor measuring the temperature of the air entering the indoor unit.

• Faulty suction air temperature sensor
• Damaged or disconnected wiring to the sensor

Click steps to track your progress.

1. 1

   Check the wiring to the suction air temperature sensor for any loose connections or damage.

2. 2

   Ensure the sensor is clean and unobstructed.

3. 3

   If the wiring is fine, a technician should verify and potentially replace the sensor.