Error 15 — Gas valve command fault

What does 15 mean?

The boiler displays error code 15, signifying a problem with the command signal sent to the gas valve. This means the boiler is unable to properly control the gas flow.

• Loose or faulty wiring harness connection at the gas valve.
• Loose or faulty wiring harness connection at the PCB.
• Faulty PCB (Printed Circuit Board).

Click steps to track your progress.

1. 1

   Check the wiring harness connection at the gas valve to ensure it is secure and properly seated.

2. 2

   Inspect the wiring harness connection at the PCB (control board) for any looseness or damage.

3. 3

   If the wiring harness appears to be in good condition, a professional technician may need to replace the PCB.