What does the Glow-worm Betacom F43 fault code mean?
The F43 fault code on a Glow-worm Betacom boiler indicates an issue with the air pressure switch, which is responsible for detecting the presence of airflow in the combustion chamber. This fault can prevent the boiler from operating safely and efficiently.
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 air pressure switch itself may be defective or malfunctioning, leading to incorrect readings and triggering the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to gas appliances, including the air pressure switch. Attempting to fix it yourself can be dangerous and may void any warranties.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving an F43 fault code is approximately £150 to £250. This includes the cost of a new air pressure switch and labour, as it is a common issue that can be resolved relatively quickly by a qualified engineer.