4250 <4350> (U6) Power module trouble or overcurrent trouble

What does 4250 <4350> (U6) mean?

This error signifies a problem with the power module or an overcurrent condition. This is a critical electrical fault that can be caused by short-circuited wiring, a faulty compressor, or a defective outdoor power circuit board.

• Short-circuit caused by looseness or disconnection of compressor wiring.
• Defective compressor.
• Defective outdoor power circuit board.

Click steps to track your progress.

1. 1

   Immediately turn off the power to the outdoor unit at the main circuit breaker.

2. 2

   Do not attempt to restart the unit until inspected, as this is a serious electrical fault.

3. 3

   A qualified HVAC technician or electrician must be contacted to diagnose and resolve this issue.

4. 4

   The technician will check compressor wiring, the compressor itself, and the outdoor power circuit board.

5. 5

   This type of fault requires professional expertise and specialized tools for safe diagnosis and repair.