53 — Fumes outlet obstructed

What does 53 mean?

The exhaust outlet for the boiler's fumes is blocked, which can prevent safe operation and lead to the boiler shutting down.

• Obstruction in the drainage pipe
• Blockage in the flue system

Click steps to track your progress.

1. 1

   Disconnect the boiler from the mains power supply for a few seconds, then switch it back on.

2. 2

   Visually inspect the visible parts of the flue and drainage pipe for any obvious blockages or damage (if safe and accessible).

3. 3

   If the fault persists or you suspect a serious obstruction, contact an Authorised Service Centre immediately.