BoilerFaultCodes.com
Fd Low Warning

Your boiler is simply reporting that the reset button was held down for too long or pressed when there wasn't a fault to clear.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Reset button pressed by mistake.

What causes this fault?

This code appears when the reset button on the control panel has been pressed or held down for longer than the internal timer allows, typically when no actual fault was present to be cleared. It is often caused by accidental contact with the button while cleaning the unit or by a homeowner trying to restart the system unnecessarily. Because the button was held too long, the boiler’s software flags this as an error to prevent the electronics from getting stuck in a reset cycle.

Typical repair cost £0 (including labour)

DIY fix possible

Press the reset button again briefly (for less than one second).Wait for the boiler to complete its restart sequence.If the code persists, turn the power to the boiler off and back on at the fused spur switch.

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