Low
265 on Worcester Bosch 24i / 28i Junior

Your boiler is temporarily limiting its power output because it is producing more heat than your radiators or taps can currently take away.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

The boiler is waiting in response to a heat demand – the boiler regularly switches to partial load

Shared across the 24i / 28i Junior range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Ensure all radiator valves (TRVs) are fully open to allow heat to circulate.Check that the boiler pressure is between 1 and 1.5 bar on the pressure gauge.Deep-clean any magnetic system filters if you are familiar with the process.

Find a Gas Safe engineer
Search the official register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like 265: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

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

Related fault codes

200View →201View →

All 27 fault codes on the 24i / 28i Junior

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

24i28i200203208AA1A8BCDEFF1F2Flash once per secondGHILight onNo CH function (DHW OK)No DHW function (CH OK)No lights and no functions (with demand)rET1T3

Related guides you might find useful

Radiator not heating up

One cold radiator is usually a stuck valve pin or trapped air.

Read →

Hot water works but heating does not

On a combi it is usually the diverter valve. On a system boiler, the motorised valve.

Read →

Banging, kettling or whistling noise

Each noise points to a different fault.

Read →