Code 233 - Fan runs too slowly

What does 233 mean?

The fan (blower) within the boiler is running too slowly, which can negatively impact combustion and exhaust. This is an interlocking fault.

• Faulty fan wiring or plug connections
• Defective fan component
• Dirt or blockage in the fan

Click steps to track your progress.

1. 1

   Check the fan wiring and plug connections for any issues.

2. 2

   Inspect the fan for any dirt or blockage, and clean if necessary.

3. 3

   If the fan is defective, it may need to be replaced by a qualified technician.