Ideal Classic HE Fault codes & diagnostics

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

Regular LPGNatural Gas 15-18 kW 2003-2007 Discontinued
GC Numbers 41-395-0141-395-0241-395-0341-395-04

Replaced by: Logic Heat

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Fault codes

All 2 documented codes

Tap any card for details

Neon I3

Your boiler has electrical power and is currently functioning normally, as this light simply indicates the mains power is switched on.

Low DIY-safe

What to check first

  1. Check if other control lights are flashing to indicate a real fault
  2. Ensure your room thermostat is turned up to call for heat
  3. No action is required if the boiler is providing heating and hot water
Full explanation for Neon I3
Neon SG1

Your boiler is currently trying to light the flame and this light will go off once the burner has started successfully.

Low DIY-safe £0-120

What to check first

  1. Monitor the light to ensure it stops flashing once the boiler fires up
  2. No action is required as this is normal operational feedback
  3. If the light continues to flash without the boiler lighting, try resetting the boiler

Parts commonly replaced

  • Ignition Electrode
  • Detection Lead
  • Gas Valve
Full explanation for Neon SG1