What does the Glow-worm Flexicom F56 fault code mean?
The F56 fault code on a Glow-worm Flexicom boiler indicates a problem with the zone valve, which is responsible for controlling the flow of hot water to different heating zones in your home. This fault can prevent the boiler from operating correctly, leading to heating or hot water issues.
Common Causes
- Faulty Zone Valve Motor: The motor that operates the zone valve may be malfunctioning, preventing it from opening or closing properly.
- Wiring Issues: Damaged or loose wiring connections to the zone valve can disrupt its operation, leading to the F56 fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to the zone valve, as it involves gas and electrical components. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a faulty zone valve on a Glow-worm Flexicom boiler is approximately £150 to £250. This includes the cost of the replacement part and labour, as zone valve replacements typically require professional installation.