Ideal Mini Fault codes & diagnostics

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

CombiSystem Natural Gas 24-32 kW 2006-2009 Discontinued

Replaced by: Logic

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Fault codes

All 2 documented codes

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LED / flash-pattern codes
Flashing lamp

Your boiler has detected that the water inside the unit is getting too hot, so it has safely shut itself down to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • Pump
  • Thermistor sensor
  • Heat exchanger
Full explanation for Flashing lamp
Digital codes
A short pulse every 4 seconds

Your boiler is currently on standby and is running its built-in protection mode to prevent the internal pipes from freezing during cold weather.

Low DIY-safe

What to check first

  1. No action is required as this is normal operation.
  2. Ensure your gas and electricity supplies remain turned on so the protection can continue.
  3. Check that your external thermostat or programmer is calling for heat if you want the boiler to provide heating.
Full explanation for A short pulse every 4 seconds