What does the Viessmann Vitodens 222-F F36 fault code mean?
The F36 fault code indicates a malfunction with the pressure switch in the Viessmann Vitodens 222-F boiler. This issue typically arises when the pressure switch fails to detect the correct water pressure, which can prevent the boiler from operating safely and efficiently.
Common Causes
- Blocked Pressure Switch Tubing: Debris or blockages in the tubing connected to the pressure switch can prevent accurate pressure readings.
- Faulty Pressure Switch: The pressure switch itself may be defective or worn out, leading to incorrect pressure detection.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as working with gas appliances can be dangerous. Attempting to fix the pressure switch without proper training may lead to further complications or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty pressure switch on a Viessmann Vitodens 222-F is around £150 to £250. This includes the cost of the part and labour, as pressure switches can vary in price and installation may require specific expertise.