BoilerFaultCodes.com
202 O Low Information

Your boiler is taking a short, programmed break to prevent itself from turning on and off too frequently, which helps protect the internal components and improve efficiency.

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: Boiler in anti-cycle mode

What causes this fault?

This occurs when your boiler has reached its target temperature and shuts down briefly to prevent 'short-cycling,' which is when the unit turns on and off too rapidly. It happens because the heat produced by the boiler is being generated faster than your radiators can release it into your rooms. By pausing for a few minutes, the boiler protects its internal components from unnecessary wear and tear while waiting for the system water to cool down.

This status is more common during autumn and spring when your heating is on but the outside temperature is mild, meaning your home requires less heat than the boiler’s minimum output.

Typical repair cost £0 (including labour)

DIY fix possible

Wait 15 to 30 minutes for the timer to finish automaticallyEnsure all radiator valves are fully open to allow heat to dissipateCheck that your room thermostat is set higher than the current room temperature

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 202 O — 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.

Related fault codes