BoilerFaultCodesThe 6 most common faults
01
Low Water Pressure High DIY-safe
Your boiler has stopped working because the amount of water inside the system has dropped below the required level.
What to try first
Locate the filling loop, which is usually a small silver braided hose or a built-in lever underneath the boiler.Slowly open the valve to let water enter the system until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.Close the valve tightly and check that the error code has cleared.
02
Boiler Type Card Fault High Engineer
Your boiler has lost the digital instructions telling it how to function, which prevents it from starting up correctly.
Full guide for Boiler Type Card Fault03
c2 High Engineer
Your boiler's computer memory card is not being recognised, meaning the system cannot run its operating programme.
Full guide for c204
c0 High Engineer
Your boiler's computer memory card is not being recognised, which prevents the system from starting up correctly.
Full guide for c005
82 High Engineer
Your boiler is struggling because the electricity supply coming from your wall socket is too weak or unstable to run it correctly.
Full guide for 8206
L2 High Engineer
Your boiler has stopped working because it cannot light its internal flame, which is often caused by a frozen or blocked pipe that drains away waste water.
Full guide for L2on the Ideal Independent
Pressure relief valvePressure gaugeExpansion vesselBoiler Interface CardPCBBoiler Chip Card (BCC)
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 Ideal 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