BoilerFaultCodes.com
Fd Low Lockout

Your boiler has temporarily stopped because the reset button was held down for too long or pressed accidentally.

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 fault occurs when the boiler's control board detects that the reset button has been held down for more than 15 seconds. It is usually triggered manually by a user attempting to clear a different fault or by someone accidentally leaning against the control panel. The system interprets the prolonged press as a signal error and pauses operation as a safety precaution.

Typical repair cost £0 (including labour)

DIY fix possible

Press the reset button again firmly once.Wait 30 seconds for the boiler to restart.Ensure no buttons are being held down by the front cover or obstructions.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Protect yourself from future repair bills

A boiler cover plan would cover faults like Fd — no call-out fees, no surprises.

Top rated
OpenFix
Boiler & heating care plans
Get a quote →
Hometree
from £12.95/month
Get a quote →
HomeServe
from £8.00/month
Get a quote →

Affiliate links — we may earn a commission at no extra cost to you.

Worcester Bosch RD 532 Combi is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

UK's #1 online installer
Boxt
Fixed-price online quotes. Next-day installation.
Get a free quote →
Heatable
Instant online boiler quotes from £1,499.
Get a free quote →
iHeat
Fast installation. Price match guarantee.
Get a free quote →

Affiliate links — we may earn a commission at no extra cost to you.

Related fault codes