Low
FD on Worcester Bosch CDi Classic

Your boiler has entered a temporary standby mode because the reset button was pressed accidentally or held down for too long.

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.

What the manual says

Manufacturer manual

Reset button pressed by mistake – press reset button again.

From this model's manual
Verified against the Worcester Bosch Cdi Classic installation & service manual, page 54.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This code appears when the boiler’s reset button has been pushed by mistake or held down for longer than five seconds. It is a safety feature that puts the system into a temporary standby mode to prevent accidental configuration changes. Simply pressing the button again briefly will usually clear the status and return the boiler to normal operation.

DIY fix possible

Press the 'Reset' button firmly once more to clear the error.Wait approximately 3 to 5 seconds for the boiler to restart.Verify that the display returns to its normal temperature reading or status code.

Find a Gas Safe engineer
Search the official register →

Avoid the next call-out bill

A cover plan would handle faults like FD: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

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

Related fault codes

Related guides you might find useful