What does the Glow-worm F22 fault code mean?

Your boiler has stopped working because the water pressure is too low for it to operate safely.

How much does it cost to fix Glow-worm error code F22?

Typical repair cost for the Glow-worm F22 fault is £0-120 including labour.

Can I fix Glow-worm fault code F22 myself?

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

Glow-worm F22 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

Water pressure of the installation (<0.3 bar) | Return water valve closed Pump disconnected Leak in the installation | • Fill the installation. • Purge the installation. • Check the pump connections. • Check the flow and return heating sensor connections. • Check that there are no leaks.

From this model's manual

Verified against the Glow Worm/Glow Worm Easicom 24 installation & service manual, page 28.

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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Boiler cover options

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A cover plan would handle faults like F22: no call-out fees, no surprise bills.

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Related fault codes

F24View →F25View →

All 92 fault codes on the Easicom 24

Seeing a different code? Every code this model can display, in one place.

d.00 d.01 d.08 d.09 d.10 d.16 d.17 d.20 d.22 d.23 d.33 d.34 d.36 d.40 d.41 d.43 d.44 d.47 d.67 d.68 d.69 d.71 d.80 d.81 d.82 d.83 d.90 d.93 d.96 Err F00 F01 F10 F11 F20 F23 F24 F26 F27 F28 F29 F32 F49 F61 F62 F63 F64 F65 F67 F68 F70 F71 F72 F73 F74 F76 F77 F83 F84 F85 F86 P.01 P.02 P.03 P.06 P.07 S.00 S.01 S.02 S.03 S.04 S.05 S.06 S.07 S.08 S.10 S.11 S.13 S.14 S.15 S.16 S.17 S.30 S.31 S.32 S.34 S.41 S.53 S.54 S.96 S.98

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Your boiler has stopped working because the water pressure is too low for it to operate safely.

What the manual says

Engineer required

Avoid the next call-out bill

Related fault codes

All 92 fault codes on the Easicom 24

Related guides you might find useful

Boiler keeps losing pressure

Low pressure — repressurise guide

When to replace your boiler

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