How much does it cost to fix boiler error code Condensate Drain Blockage?

Typical repair cost for the boiler Condensate Drain Blockage fault is £80-150 including labour.

Condensate Drain Blockage High

Boiler Fault Code Condensate Drain Blockage

Also written as CONDENSATEDRAINBLOCKAGE — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Condensate Drain Blockage appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because the waste water pipe that carries away moisture is blocked, often due to frozen debris inside the pipe outside your home. (As reported on Glow-worm Betacom C)

Pick your boiler brand for the Condensate Drain Blockage fix

Glow-worm Condensate Drain Blockage 1 model

Source

Information for the Condensate Drain Blockage fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026