BoilerFaultCodes.com
S.28 Low Information

Your boiler is taking a short, programmed break to prevent itself from turning on and off too frequently, which protects the components from unnecessary wear.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Anticycling period

What causes this fault?

This occurs when your boiler reaches its target temperature too quickly, often because your radiators have already heated your home or are turned off. To prevent wasting energy and wearing out internal parts by clicking on and off constantly, the boiler enters a temporary 'rest' mode. It is waiting for the system water to cool down slightly before it begins the next heating cycle.

This is more common during the milder autumn and spring months when your home requires less heat to stay warm than in the peak of winter.

Typical repair cost £0 (including labour)

DIY fix possible

Check that your room thermostat is turned up higher than the current room temperature.Ensure at least one or two radiators have their valves fully open to allow heat to move away from the boiler.Wait 10 to 15 minutes for the countdown to end, as the boiler will usually restart automatically.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Protect yourself from future repair bills

A boiler cover plan would cover faults like S.28 — no call-out fees, no surprises.

Top rated
OpenFix
Boiler & heating care plans
Get a quote →
Hometree
from £12.95/month
Get a quote →
HomeServe
from £8.00/month
Get a quote →

Affiliate links — we may earn a commission at no extra cost to you.

Glow-worm Flexicom cx is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

UK's #1 online installer
Boxt
Fixed-price online quotes. Next-day installation.
Get a free quote →
Heatable
Instant online boiler quotes from £1,499.
Get a free quote →
iHeat
Fast installation. Price match guarantee.
Get a free quote →

Affiliate links — we may earn a commission at no extra cost to you.

Related fault codes