A19
Wolf
Mains Voltage / Power Supply Fault
Boiler shows A19, display may flicker, random lockouts
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Supply voltage outside permitted range, Loose mains connection, Faulty internal power supply on PCB, Shared circuit with heavy loads causing dips
How to Fix / Troubleshooting
Safety: Electrical work must be carried out by a qualified electrician or heating engineer.
- Check other appliances: If lights dim or other devices reset, there may be a supply issue. Contact your electricity provider.
- Inspect plug/fuse (if applicable): Ensure the boiler’s fused spur or plug is secure and the correct fuse rating is used.
- Avoid shared high-load circuits: Large appliances should not share the same circuit as the boiler where possible.
- Technician tasks: A professional can measure supply voltage, tighten terminals, and replace the PCB if its power supply section is defective.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board (PCB)
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