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15

Error 15 - Gas Valve Fault

Baxi · Duo-tec 2 Combi GA Boilers

What does 15 mean?

This error code signifies a fault within the gas valve component of the boiler. The boiler's display will show the spanner symbol and the numeric error code, indicating an internal issue.

Common Causes

  • Malfunctioning gas valve
  • Electrical issue with the gas valve circuitry
  • Internal boiler component failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Press the 'R' (reset) button firmly for several seconds to attempt to clear the fault.

  2. 2

    If the error persists, turn off the boiler's electrical supply at the isolation switch for 30 seconds, then turn it back on.

  3. 3

    If the fault code reappears, contact your installer or the Baxi service division ('heateam') for assistance.

Browse all codes in this manual (28)
Verified technical data. Last updated: April 2026

Related Faults

09Error 09 - Gas Valve Connection Cable Fault109Error 109 - Pre-circulation Fault110Error 110 - Safety Thermostat Activated
Source: Baxi Duo-tec 2 Combi GA Boilers
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