How much does it cost to fix Alpha error code E19?

Typical repair cost for the Alpha E19 fault is £80-140 including labour.

E19 High

Alpha E19 Fault Code

Q: What does the Alpha E19 fault code mean?

Your boiler has stopped working because the waste water pipe is either blocked or full, often caused by the outdoor section of the pipe freezing in cold weather.

The Alpha E19 fault code means: your boiler has stopped working because the waste water pipe is either blocked or full, often caused by the outdoor section of the pipe freezing in cold weather.. It appears on 5 Alpha models in our database.

Technical description: Condensate trap full or blocked

Typical repair cost £80-140 (including labour)

DIY fix possible

Locate the plastic pipe leading from your boiler to the outside drain.Check for any visible blockages or debris at the end of the pipe.If the weather is freezing, pour warm (not boiling) water over the external pipe to melt any internal ice.Reset the boiler using the dial or button on the front panel.

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Alpha models that show the E19 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Alpha E19 fault code information on this page is sourced and cross-checked against the official Alpha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026