IVT Intermittent Lockout / Unstable Operation

Boiler frequently needs resetting to restore operation

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

Marginal ignition electrode, Unstable gas supply, Intermittent sensor wiring fault, PCB starting to fail

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

Steps:

Note any error codes displayed before reset and provide them to a technician.
Ensure flue terminal and condensate pipe are clear.
A technician should inspect and, if necessary, replace ignition and ionisation electrodes, check gas pressures, and test all NTC sensors and wiring.
If no specific component fault is found, the main PCB may require replacement.

Hard 4/5

Ignition / Ionisation Electrode Set

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