Red 3 Flashes, Green 8 Flashes (Single System) — Compressor Temperature Sensor Failure

What does Red 3 Flashes, Green 8 Flashes mean?

The red LED flashes three times and the green LED flashes eight times on the indoor unit. This signals a failure with the compressor temperature sensor in the outdoor unit.

• Disconnected or damaged compressor temperature sensor.
• Wiring fault to the compressor sensor.
• Faulty outdoor unit control board.

Click steps to track your progress.

1. 1

   Shut off the power to the entire air conditioning unit at the electrical panel.

2. 2

   Allow the unit to remain powered off for at least 30 seconds.

3. 3

   Turn the power back on and check if the error code has cleared.

4. 4

   If the fault persists, a certified HVAC technician should inspect and diagnose the outdoor unit's compressor.