Common problems guide

The most common Daikin EKOMB 22 Combi problems

The faults most likely to send a Daikin EKOMB 22 Combi into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

20 documented codes
6 most common
0 DIY-safe checks
6 engineer needed

The 6 most common faults

01
8 High Engineer

Your boiler has stopped working because the internal fan that safely removes waste gases isn't spinning at the correct speed.

Est. cost
£250-450
Parts
Fan assembly, Printed Circuit Board (PCB), Wiring harness
Full guide for 8
02
10 High Engineer

Your boiler has stopped working because it is unable to accurately read the temperature of the water inside the system.

Est. cost
£150-250
Parts
Flow temperature sensor, Wiring harness
Full guide for 10
03
11 High Engineer

Your boiler has stopped working because it is unable to accurately read the temperature of the water inside the system.

Est. cost
£120-220
Parts
Temperature sensor, Wiring harness
Full guide for 11
04
12 High Engineer

Your boiler has stopped working because it cannot correctly read its internal temperature, causing it to shut down for safety.

Est. cost
£150-250
Parts
Temperature sensor (NTC), Wiring harness
Full guide for 12
05
13 High Engineer

Your boiler has stopped working because it is unable to accurately read the temperature of the water inside the system due to a faulty sensor connection.

Est. cost
£150-250
Parts
Flow temperature sensor, Wiring harness
Full guide for 13
06
14 High Engineer

Your boiler has stopped working because it is unable to accurately read the temperature of the water inside the system.

Est. cost
£150-250
Parts
Temperature sensor (NTC), Wiring harness
Full guide for 14

on the Daikin EKOMB 22 Combi

Fan assemblyPrinted Circuit Board (PCB)Wiring harnessFlow temperature sensorTemperature sensorTemperature sensor (NTC)

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 Daikin 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

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See the full 20-code list for the Daikin EKOMB 22 Combi