Common problems guide

The most common Remeha Avanta 28c problems

The faults most likely to send a Remeha Avanta 28c 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.
22 documented codes
6 most common
2 DIY-safe checks
4 engineer needed

The 6 most common faults

01
é7 High DIY-safe

Your boiler has detected that the water pressure inside the system is far too low to function safely.

What to try first

Locate the filling loop (usually two silver taps connected by a braided hose) underneath the boiler.Gradually open the taps to let mains water into the heating system until the pressure gauge reads between 1.0 and 1.5 bar.Close both taps tightly and check the display to see if the error has cleared.

Est. cost
£80-150
Parts
Pressure relief valve, Filling loop, System pressure sensor
Full guide for é7
02
é10 High DIY-safe

Your boiler has temporarily stopped working and needs to be manually restarted using the reset button.

What to try first

Locate the reset button on your boiler's control panel.Press and hold the reset button for about 5 seconds.Wait to see if the boiler fires up normally; if the code returns, do not keep resetting it.

Parts
Control PCB, Ignition transformer
Full guide for é10
03
9 High Engineer

Your boiler has temporarily stopped working because a safety switch or external device connected to it, such as a room thermostat or timer, has broken the circuit.

Est. cost
£90-180
Parts
External room thermostat, Wiring center, Timer/programmer
Full guide for 9
04
é1 High Engineer

Your boiler is currently performing a necessary safety check before it attempts to ignite, but it has stalled at this initial stage.

Est. cost
£120-250
Parts
Fan, Air pressure switch, Printed Circuit Board (PCB)
Full guide for é1
05
é2 High Engineer

Your boiler is failing to light the flame, which means it cannot produce any heating or hot water for your home.

Est. cost
£150-300
Parts
Ignition electrode, Gas valve, PCB
Full guide for é2
06
é4 High Engineer

Your boiler has failed to light the flame after several attempts and has switched itself off to prevent a build-up of unburnt gas.

Est. cost
£120-250
Parts
Ignition electrode, Gas valve, Ignition transformer
Full guide for é4
Parts most often replaced

on the Remeha Avanta 28c

Pressure relief valveFilling loopSystem pressure sensorControl PCBIgnition transformerExternal room thermostat

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 Remeha 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 22-code list for the Remeha Avanta 28c

Related guides

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