BoilerFaultCodesTechnical description
Condensate pump over level switch activated - reservoir level too high resulting in ignition lockout.
What causes this fault?
This fault occurs when the boiler's internal drainage system becomes blocked, preventing the waste water produced during heating from leaving the unit. The most common reason is a buildup of debris in the condensate trap or a failure of the mechanical pump that pushes the water away. To prevent internal flooding and damage, a safety switch triggers and shuts the boiler down until the water level drops.
This fault is more common in winter, as the external pipe that carries the waste water away can freeze, causing water to back up into the boiler.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.