High Lockout
b 26 on Vokera Hydra

Your boiler is unable to drain the water it produces during normal operation, which is causing it to shut down to prevent internal damage.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Condensate trap blocked

What causes this fault?

This fault occurs when the internal trap or the external drainage pipe becomes obstructed, preventing the boiler from safely disposing of the wastewater it produces during operation. The most common reason is a buildup of sludge and debris within the trap itself, or an ice blockage in the external pipework following a cold spell.

This fault is significantly more common during winter, as the wastewater in the external discharge pipe can freeze and 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.

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