Gas Safe registered · Tipton

Glow-worm F.28 Fault Code in Tipton

Glow-worm showing F.28 in Tipton? The boiler tried to ignite and failed. Three quick checks to do first, and what a gas engineer looks at if it keeps coming back.

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F.28 on a Glow-worm means the boiler went through its lighting sequence and never detected a flame, so it locked itself out. In Tipton the everyday causes are simple ones: the meter has run out, the gas has been turned off at the meter after other work, or the condensate pipe has frozen on a hard morning. If those check out, the fault is inside the boiler and needs a gas engineer. Model years differ, so confirm against your manual.
What's involved

Glow-worm F.28 Fault Code in Tipton, done properly

Try another gas appliance

If the hob will not light either, the boiler is fine and the supply is not. Check the meter lever is in line with the pipe, and on a prepayment meter check the credit.

The pipe outside in winter

The thin plastic pipe leaving the wall carries water from the boiler. When it freezes the boiler shuts down. Pour warm water, not boiling, along it and try once more.

One reset only

Press reset and wait. If F.28 appears again on the next attempt, switch off and leave it rather than cycling it over and over.

Inside the case

An engineer will test gas pressure at the boiler, look at the spark electrode and flame sensor, and check the gas valve and flue. Nothing here is a homeowner job.

Good to know

Glow-worm F.28 Fault Code — your questions

Could F.28 be a gas leak?

No, it means gas was not burning, not that gas is escaping. A smell of gas is different: leave the house, do not touch switches, and call 0800 111 999 straight away.

It worked yesterday and stopped overnight. Why?

A cold snap freezing the condensate pipe is the classic cause of a boiler that is fine in the day and dead by morning.

How can I check who is coming?

Ask for the Gas Safe ID card when they arrive and read the back. It shows the appliance types that engineer is qualified for.

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