Glow-worm Fan Assembly Micron 70-80FF GLOWWORMS227035

The Glow-worm S227035 is a fan assembly for Glow-worm Micron 70FF and 80FF appliances. It combines the fan impeller and its housing, and sits in the combustion air path where it draws air into the burner and drives the products of combustion out through the flue. Correct fan operation is what proves airflow to the boiler's control sequence, so the assembly has a direct bearing on ignition, flame stability and safe flue discharge.

• The boiler locks out or fails to establish a flame shortly after the ignition sequence begins.
• Grinding, scraping or rumbling noise from the fan area, or a fan that runs unevenly.
• Intermittent ignition faults that clear on a reset and return once the appliance cools.
• A fan proving or air pressure fault code logged by the boiler controls.
• Visible damage, stiffness or contamination on the impeller when the casing is opened.

• Confirm the appliance model and GC number from the data badge, then cross-check against the manufacturer's parts information for the Micron 70FF and 80FF.
• Compare the part number stamped or labelled on the existing fan with S227035 before removing it.
• Check whether the fan mounting gasket or seal is reusable; a replacement seal is normally required if the original is compressed or torn.