Glow-worm 417637 Fan Assembly

Restore safe, reliable combustion on classic Glow-worm Fuelsaver 80F / 80FF boilers. This OEM fan drives combustion air through the chamber and assists flue gas extraction. If the fan is out of spec, the boiler will not fire for safety.

Key Features

• Glow-worm part: 417637
• Factory-matched airflow and pressure for stable ignition
• Direct-fit replacement (no modifications required)
• Includes mounting plate/gasket where supplied

Typical Compatibility*

• Fuelsaver 80F / 80FF
• Also referenced against certain Combi FF variants (verify by diagram)

*Always confirm by matching the exact part number in your boilers exploded diagram or parts list.

Symptoms of a failing fan

• Boiler fails to light or locks out on start-up
• Unstable flame / irregular burner pressure
• Intermittent heating or hot water with no other sensor faults

Install & Safety

This is a gas-appliance safety component. Installation and commissioning must be carried out by a qualified, Gas Safe registered engineer. After fitting, verify inlet/outlet pressures and complete full combustion checks.

Note: Many distributors list this legacy part as obsolete/limited stock; availability may be restricted.