Ideal Logic Code Combi 26 Fault codes & diagnostics

2 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Combi Natural Gas 2011-2013 Discontinued
GC Number 47-348-74
Download the Ideal Logic Code Combi 26 manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

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Fault codes

All 2 documented codes

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C2

Your boiler's electronic memory card is not being recognised, which prevents the system from starting up safely.

High Engineer only £150-300

Parts commonly replaced

  • Boiler Chip Card (BCC)
  • Main PCB
Full explanation for C2
L 1

Your boiler has switched itself off because the internal water temperature has become too hot, usually caused by a lack of water flow through the system.

High DIY-safe £120-£350

What to check first

  1. Check that your radiator valves are fully open
  2. Ensure your boiler pressure is between 1 and 1.5 bar on the gauge
  3. Reset the boiler by turning the control knob to 'RE' or pressing the reset button

Parts commonly replaced

  • Circulating pump
  • Thermistor (NTC sensor)
  • Main heat exchanger

Related codes

Full explanation for L 1