Common problems guide

The most common Chaffoteaux Britony II 30FF problems

The faults most likely to send a Chaffoteaux Britony II 30FF into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

This model is discontinued. Parts can be harder to source and expensive. If repair costs are mounting, a new A-rated boiler may be the smarter choice.
37 documented codes
6 most common
4 DIY-safe checks
2 engineer needed

The 6 most common faults

01
8.5 High DIY-safe

Your boiler is trying to start but the burner is failing to ignite, meaning you currently have no heating or hot water.

What to try first

Check if other gas appliances, like a hob, are working to ensure gas is reaching the propertyCheck that your gas pre-payment meter (if applicable) has creditPress the Reset button once to see if the boiler restarts

Est. cost
£100-280
Parts
Ignition electrodes, Gas valve, Printed Circuit Board (PCB)
Full guide for 8.5
02
8.12 High DIY-safe

Your boiler has detected that the water pressure is too low to operate safely, causing it to shut down.

What to try first

Locate the filling loop (usually a silver flexible hose) under the boiler.Slowly open the small valves to allow water into the system.Watch the pressure gauge and close the valves once it reaches between 1.0 and 1.5 bar.

Est. cost
£0-120
Parts
Filling loop, Pressure sensor, Expansion vessel
Full guide for 8.12
03
8.1 High DIY-safe

Your boiler is unable to start the pilot flame, which means it cannot provide any heating or hot water until the ignition process is successful.

What to try first

Check if your gas supply is turned on and other gas appliances are workingPress the reset button once to try and restart the ignition sequenceEnsure there is credit on your pre-payment gas meter

Est. cost
£100-280
Parts
Ignition electrode, Gas valve, Printed Circuit Board (PCB)
Full guide for 8.1
04
8.15 High DIY-safe

Your boiler has lost water pressure and does not have enough water inside it to run safely.

What to try first

Locate the filling loop (the flexible silver hose usually found underneath the boiler).Slowly open the one or two small valves on the hose until you hear water entering the system.Watch the pressure gauge and close the valves tightly once the needle reaches 1.5 bar.

Est. cost
£0-120
Parts
Filling loop, Pressure sensor, Expansion vessel
Full guide for 8.15
05
WATER TEMPERATURE High Engineer

Your boiler is struggling to heat your hot water properly, usually because the water is flowing through it too quickly for it to warm up or because the gas supply is restricted.

Est. cost
£120-250
Parts
Water governor, Venturi, Flow regulator
Full guide for WATER TEMPERATURE
06
HEATING BODY NOISE High Engineer

Your boiler is making loud banging or kettling noises because of a buildup of limescale or poor water circulation, which is causing parts to overheat.

Est. cost
£150-300
Parts
Primary Heat Exchanger, System Filter, Central Heating Pump
Full guide for HEATING BODY NOISE
Parts most often replaced

on the Chaffoteaux Britony II 30FF

Ignition electrodesGas valvePrinted Circuit Board (PCB)Filling loopPressure sensorExpansion vessel

Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.

Call a Gas Safe engineer if…

  • You can smell gas or see signs of a leak
  • The Chaffoteaux shows an Emergency or High severity code
  • The boiler keeps locking out after repeated resets
  • You've tried the DIY checks and the fault hasn't cleared
  • There's visible water leaking from the boiler
  • The flame is yellow or orange instead of blue
See the full 37-code list for the Chaffoteaux Britony II 30FF

Related guides

Boiler losing pressure → No hot water → When to replace → Symptom checker →