What does the Glow-worm Flexicom F38 fault code mean?
The F38 fault code on a Glow-worm Flexicom boiler indicates a problem with the air pressure switch, which is responsible for detecting the airflow necessary for safe operation. This fault can prevent the boiler from firing up, leading to heating and hot water issues.
Common Causes
- Blocked Flue: A blockage in the flue system can restrict airflow, causing the air pressure switch to fail to operate correctly.
- Faulty Air Pressure Switch: The switch itself may be defective or stuck, preventing it from accurately detecting the pressure changes.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to diagnose and repair this issue, as working with gas appliances can be dangerous. Attempting to fix gas or electrical components without proper training can lead to serious safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the F38 fault code is around £150 to £250, which includes the replacement of the air pressure switch and any necessary labour. This cost reflects the price of parts and the expertise required for safe installation.