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randallelizabethAug 12, 2025
What to do if my Glow-worm Thermostat displays a boiler fault (e.g., F.33)?
- Bbrandon39Aug 12, 2025
If your Glow-worm Thermostat displays a boiler fault code (like F.33), try resetting the boiler by selecting 'Reset' and then 'Yes'. If the fault message continues to appear after the reset, contact a qualified technician for assistance.