F5 - 1 red flash, 2 green flashes — 63H open

What does F5 mean?

This error code signifies that the high-pressure switch (63H) has opened. This switch is a safety device that trips if system pressure becomes too high.

• High-pressure switch disconnected
• Contact failure in the high-pressure switch
• System overpressure condition
• Defective control board

Click steps to track your progress.

1. 1

   Check the high-pressure switch for a secure connection.

2. 2

   Verify the switch's continuity.

3. 3

   Ensure the system pressure is within normal operating limits (requires professional check).

4. 4

   Consider a possible defective board if other checks are clear.