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Fault symbol (lightning bolt with cross)

Display shows Fault symbol — Burner is prevented from lighting

Baxi · Duotec+ GA Compact Boilers

What does Fault symbol (lightning bolt with cross) mean?

A lightning bolt with a cross over it is displayed, indicating a general fault that is preventing the boiler's burner from igniting. This symbol can appear for various underlying issues.

Common Causes

  • Various internal boiler faults
  • Gas supply issues
  • Pressure problems in the heating system

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Press and hold down the Reset button for 2 seconds to try clearing the fault.

  2. 2

    Ensure the main gas tap to the boiler is open and the system pressure is correct.

  3. 3

    If the symbol persists and is accompanied by a specific fault code, refer to that code's troubleshooting steps.

  4. 4

    If no specific code is shown and the issue persists, contact an Authorised Service Centre.

Browse all codes in this manual (37)
Verified technical data. Last updated: April 2026

Related Faults

0909 — Gas valve connection error1010 — External probe sensor faulty109109 — Air in boiler circuit (temporary fault)
Source: Baxi Duotec+ GA Compact Boilers
Open Manual (Page 5)Search more codes in this manual