Common problems guide

The most common Remeha Selecta Combi problems

The faults most likely to send a Remeha Selecta Combi 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.

The 6 most common faults

01

E01 High Engineer

Your boiler has detected an internal electronic error and has shut itself down as a safety precaution to prevent incorrect operation.

Est. cost: £200-450
Parts: Control Unit/PCB

Full guide for E01

02

E02 High Engineer

Your boiler has detected that it is getting too hot and has automatically shut itself down to prevent damage.

Est. cost: £120-250
Parts: Safety Thermostat (STB), Pump, Diverter Valve

Full guide for E02

03

E04 High Engineer

Your boiler has tried to start five times without success, so it has safely locked itself to prevent gas buildup.

Est. cost: £120-250
Parts: Ignition electrode, Gas valve, Ignition lead

Full guide for E04

04

E05 High Engineer

Your boiler's computer is having trouble reading its internal sensors, which is preventing it from starting up correctly.

Est. cost: £150-300
Parts: Main control board (PCB), Wiring harness, Sensor assembly

Full guide for E05

05

E07 High Engineer

Your boiler has detected that the water inside the system is getting dangerously hot while trying to heat your tap water and has safely shut down to prevent damage.

Est. cost: £150-300
Parts: DHW sensor, Diverter valve, Plate heat exchanger

Full guide for E07

06

E10 High Engineer

Your boiler is struggling to clear exhaust fumes because it cannot detect sufficient airflow through its internal ventilation system.

Est. cost: £150-£300
Parts: Air pressure switch, Flue fan, Venturi tube

Full guide for E10

Parts most often replaced

on the Remeha Selecta Combi

Control Unit/PCBSafety Thermostat (STB)PumpDiverter ValveIgnition electrodeGas valve

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 32-code list for the Remeha Selecta Combi