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Ideal Logic fault L6

False flame lockout

Gas boiler

What it means

Boiler detects flame signal when no flame should be present

Likely causes

  1. Flame detection electrode contaminated or deteriorated
  2. Internal boiler wiring routing fault
  3. Flame detection electrode connector issue

Where to start

  1. Reset boiler and check if operation returns to normal
  2. Separate flame detection electrode in-line connector
  3. Check continuity between electrode terminal pins

The full answer, free

  • 8 more checks in order
  • How to put it right, step by step
  • The manual page for this fault (page 49), right under the answer
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Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.

From the Ideal manual for the Logic. Check the model on the data plate before you order parts.

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