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Glow-worm Flexicom fault F14

Gas valve control defective

Gas boiler

What it means

Gas valve control circuit fault detected.

Likely causes

  1. Gas valve connector loose, wires unconnected, faulty or trapped
  2. Faulty main board
  3. Faulty gas valve
  4. Flue components not correctly assembled, fixed or supported
  5. Flue or flue terminal obstructed
  6. Faulty seals around appliance burner, internal flue seals, door and case seals
  7. Incorrect gas type or supply pressure/rate not checked prior to commissioning
  8. Analyser not zeroed/calibrated correctly in fresh air prior to use

Where to start

  1. Follow boiler manufacturer's installation instructions, verify gas type and check gas supply pressure/rate prior to commissioning
  2. Visually check integrity of whole flue system (especially where flue fitted by others) to confirm components correctly assembled, fixed and supported
  3. Check manufacturer's max. flue lengths have not been exceeded and guidance followed (e.g. Gas Safe Technical Bulletin TB008)

The full answer, free

  • 27 more checks in order
  • The readings and component tests from the manual
  • How to put it right, step by step
  • The manual page for this fault (page 37), 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 Glow-worm manual for the Flexicom. Check the model on the data plate before you order parts.

Other Glow-worm Flexicom fault codes