Error 407 — Compressor operation stop due to high pressure protection

What does 407 mean?

The compressor has stopped operating because the system's high pressure protection has been activated. This is a safety measure to prevent damage.

• Blocked refrigerant lines
• Dirty outdoor unit coil
• Overcharged refrigerant
• Malfunctioning high-pressure sensor

Click steps to track your progress.

1. 1

   Check if the outdoor unit's condenser fins are clean and unobstructed.

2. 2

   Ensure there are no kinks or blockages in the refrigerant lines.

3. 3

   Verify the system is not overcharged with refrigerant.

4. 4

   A technician should check the high-pressure sensor and system pressures.