What does the Glow-worm Flexicom F64 fault code mean?
The F64 fault code on a Glow-worm Flexicom boiler indicates a problem with the low limit thermostat, which is responsible for ensuring the water temperature does not drop below a certain level. This fault can prevent the boiler from operating efficiently, leading to heating issues.
Common Causes
- Faulty Low Limit Thermostat: The thermostat may be malfunctioning or have failed, causing incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the thermostat can disrupt its function, leading to the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be hazardous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the F64 fault code is around £150-£200, which includes the replacement of the low limit thermostat and any necessary labour. This cost reflects the specific nature of the part and the expertise required for safe installation.