How much does it cost to fix Heatline error code F22?

Typical repair cost for the Heatline F22 fault is £80-150 including labour.

F22 High

Heatline F22 Fault Code

Q: What does the Heatline F22 fault code mean?

Your boiler has stopped working because the water pressure inside the heating system has dropped too low.

Q: Can I fix Heatline fault code F22 myself?

Locate the filling loop (a silver flexible hose) underneath the boiler.

The Heatline F22 fault code means: your boiler has stopped working because the water pressure inside the heating system has dropped too low.. It appears on 8 Heatline models in our database.

Technical description: Water pressure of the installation (<0.3 bar)

Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the filling loop (a silver flexible hose) underneath the boiler.Open the small valve or tap on the loop to allow mains water into the boiler.Monitor the pressure gauge on the front until it reaches 1.5 bar, then turn the valve firmly off.

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Heatline models that show the F22 fault code

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

Source

Heatline F22 fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

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