Vokera General Lockout / Multiple Fault Condition

Boiler displays error code 40, resulting in no heating or hot water, which may indicate a lockout due to repeated faults.

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.

Possible Causes

Repeated ignition failures, Persistent overheat, Sensor faults not cleared, PCB safety lockout

Safety first: Do not repeatedly reset a boiler that continually locks out; this can be unsafe.

Single reset: Perform one reset as per the manual and observe the sequence. Note any other codes that appear before 40.
Record symptoms: Note noises, flashing lights, and behavior to inform an engineer.
Engineer diagnosis:
- Access boiler diagnostic history (if available) to see underlying fault codes.
- Systematically test ignition, sensors, pump, and flue components.

This code usually requires professional diagnostic tools and should not be ignored.

Professional Required 5/5