F4 - 1 red flash, 2 green flashes — 49C open

What does F4 mean?

This fault indicates that the compressor's internal thermostat (49C) has opened, likely due to overheating. This is a safety measure to protect the compressor.

• Compressor overheating
• Internal thermostat (49C) has tripped
• Contact failure within the thermostat
• Poor ventilation around the compressor

Click steps to track your progress.

1. 1

   Ensure adequate airflow around the compressor unit.

2. 2

   Check for any obstructions blocking ventilation.

3. 3

   Allow the unit to cool down before attempting to restart.

4. 4

   If the issue reoccurs, a technician should inspect the compressor and thermostat.