Glow-worm Ultracom 2 HXI Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Natural Gas 12-30 kW 2007-2013 Discontinued

Replaced by: Flexicom sx

Download the Glow-worm Ultracom 2 HXI manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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All 1 documented codes

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F1

Your boiler has failed to ignite and has shut itself down for safety, meaning you will not have any heating or hot water until it is reset or repaired.

High DIY-safe £100-350

What to check first

  1. Check if your gas meter has credit and other gas appliances like the hob are working
  2. Press the Reset button (indicated by a flame with a cross through it) for five seconds
  3. Ensure the boiler pressure gauge is between 1.0 and 1.5 bar
  4. If it is freezing outside, check that your white plastic condensate pipe hasn't frozen

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • Printed Circuit Board (PCB)
  • Spark Lead

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