Glow-worm error codes
The complete list of Glow-worm fault codes shown on the display, each with what it means and the page that explains how it is diagnosed and fixed.
Glow-worm heating appliances display 82 documented error codes. Each code below opens its own page with the official meaning, the documented causes, the safety assessment and the parts involved.
All Glow-worm Error Codes
82 codes, each with its own page. Click a code to open the meaning, the documented causes and the repair.
What Fails Most Often on Glow-worm
Grouped from the official meaning of each of the 82 codes above — not from opinion. The number is how many different fault codes point at that component.
| Component | Codes | Examples |
|---|---|---|
| Temperature Sensor | 20 | F.13, F.75, F.83, F.85 |
| Water Pressure | 9 | F.22, F.72, F.73, F.74 |
| Ignition | 9 | F.28, F.29, F.67, F04 |
| Return Sensor | 6 | F.01, F.11, F.71, F.84 |
| Gas Valve | 6 | F.61, F.82, F.88, F15 |
| Control Board | 6 | F.64, F12, F62, F63 |
| Fan | 4 | F.32, F.33, F3, F32 |
| Flow Sensor | 3 | F.00, F.10, F10 |
Parts & Prices
The parts most often involved in the Glow-worm faults listed above.
Prices and availability vary by region and are shown by the retailer, not by TroubleAtlas.
Diagnostic Tools
What an engineer uses to work through the codes on this page.
TroubleAtlas Score — Glow-worm
How Glow-worm scores
Independently assessed across six dimensions from the documentation, the fault codes and the parts network. Based on 63 error codes across 146 appliances.
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Considering a New Heating System?
If your Glow-worm appliance is over 10 years old, replacing it with a modern condensing boiler or air-source heat pump could cut energy bills and remove the recurring faults listed on this page.
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