Halstead Ace HE Fault codes & diagnostics

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

Combi Natural GasLPG 24 kW 2005-2008 Discontinued

Replaced by: Glen Dimplex / Halstead Eden CB

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 1 documented codes

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C (Flashing)

Your boiler has been manually or accidentally switched into a service testing mode, meaning it is running at a restricted low power level rather than responding to your heating demands.

Low DIY-safe £0-80

What to check first

  1. Locate the selector switch on the front control panel.
  2. Ensure the switch is set to the 'Off/Reset' position for a few seconds.
  3. Turn the switch back to the 'Heating and Hot Water' position to exit the service mode.
Full explanation for C (Flashing)