How much does it cost to fix Chaffoteaux error code 8.7?

Typical repair cost for the Chaffoteaux 8.7 fault is £90-180 including labour.

8.7 High

Chaffoteaux 8.7 Fault Code

Q: What does the Chaffoteaux 8.7 fault code mean?

Your boiler has detected that the water temperature is too low for it to operate correctly, which usually means the water is not circulating properly or a sensor is faulty.

Also written as 87 — same fault.

The Chaffoteaux 8.7 fault code means: your boiler has detected that the water temperature is too low for it to operate correctly, which usually means the water is not circulating properly or a sensor is faulty.. It appears on 3 Chaffoteaux models in our database.

Technical description: Low Water Temperature

Typical repair cost £90-180 (including labour)

DIY fix possible

Check that your boiler pressure is between 1 and 1.5 bar on the gauge.Ensure all radiator valves are fully open.Restart the boiler using the reset button to see if the error clears.

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Chaffoteaux models that show the 8.7 fault code

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

Source

Chaffoteaux 8.7 fault code information on this page is sourced and cross-checked against the official Chaffoteaux service / installation manuals for each affected model.

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