3-time blink 2.5 seconds OFF — Frequency drop by high pressure protection (Outdoor unit operates)

What does 3-time blink 2.5 seconds OFF (Outdoor unit operates) mean?

The outdoor unit LED blinks 3 times with a 2.5-second pause, and the unit is still operating. This indicates the compressor frequency has lowered because the indoor coil thermistor exceeded 55°C in HEAT mode.

• High pressure detected in the system during heating mode
• Indoor coil thermistor reading high temperature

Click steps to track your progress.

1. 1

   Ensure the indoor unit's air filter is clean and not restricting airflow.

2. 2

   Check for any obstructions preventing proper heat exchange at the indoor coil.

3. 3

   If the issue persists, a qualified technician should inspect the system for proper refrigerant levels and operation.