Neff F18 washing machine: what it means & what to check

Stop using it for now. Carrying on with this fault risks further damage or a leak. Switch it off at the wall until it has been looked at.

What F18 actually means

The machine hasn't managed to pump the water out in time, so it has stopped with the drum still full.

F18 is a drain fault on Neff (and the related Bosch and Siemens) machines. The control board expects the water level to drop once the drain pump runs; when it doesn't drop within the expected time, the cycle halts and the door stays locked with water inside. You'll usually notice it at the end of a wash or as the machine tries to start spinning.

What F18 looks like on a Neff washing machine

Most people find this page having searched for what the machine is doing rather than the code itself. On a Neff washing machine, F18 usually shows up as one or more of these:

Machine door won't open
Door won't lock or click shut
Door lock light flashing
Door stuck shut with the load inside
Won't start even with the door closed
Machine not draining
Water left in the drum at the end of the cycle
Stops mid-cycle full of water

Recognise any of those? That is this fault, and the rest of this page explains what causes it and what you can check yourself.

What usually causes it

Blocked pump filter cocoins, hair clips and buttons
Kinked or blocked waste hose, or a blocked sink trap/spigot the hose drains into
Debris jammed in the pump itself or in the sump hose
A damaged pump impeller, so the pump runs but shifts no water
Failed drain pump needing replacement

What you can safely check yourself

Work through these in order. Anything beyond this — panels off, testing parts, anything to do with the wiring — is an engineer's job, and not one to attempt with the machine plugged in.

Turn the machine off at the wall for a minute, then power back up and try a drain or spin co this sometimes clears a one-off
Bail out what water you can and clean the pump filter behind the kick panel flap at the bottom front, checking for coins and debris
Check the waste hose behind the machine isn't kinked, trapped or pushed too far down the standpipe
If it drains into a sink trap, check that outlet isn't blocked co a blanking cap or crosshair left in the sink spigot is a classic cause
Run a hot wash once it drains to clear grease and fibre from the sump

Common questions about Neff F18

What does F18 mean on a Neff washing machine?

The machine hasn't managed to pump the water out in time, so it has stopped with the drum still full. F18 is a drain fault on Neff (and the related Bosch and Siemens) machines. The control board expects the water level to drop once the drain pump runs; when it doesn't drop within the expected time, the cycle halts and the door stays locked with water inside. You'll usually notice it at the end of a wash or as the machine tries to start spinning.

Can I fix Neff F18 myself?

There are 5 checks you can safely do yourself first.

Turn the machine off at the wall for a minute, then power back up and try a drain or spin co this sometimes clears a one-off.
Bail out what water you can and clean the pump filter behind the kick panel flap at the bottom front, checking for coins and debris.
Check the waste hose behind the machine isn't kinked, trapped or pushed too far down the standpipe.
If it drains into a sink trap, check that outlet isn't blocked co a blanking cap or crosshair left in the sink spigot is a classic cause.
Run a hot wash once it drains to clear grease and fibre from the sump.

This sometimes clears with those checks. If it comes back, it needs looking at properly.

How much does it cost to repair Neff F18?

£66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.

Tried the checks and it's still showing F18?

This sometimes clears with the checks above. If it comes back, it needs looking at properly. Then it wants someone who can open it up.

What it costs, before you call: the price is the same whatever the fault turns out to be — £66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.

Our own engineers, not a call centre. We cover Nottinghamshire, Derbyshire and Leicestershire — most washing machine faults are seen same day or next day.

Call 0115 648 0929 Book online — postcode and number is all we need

Outside our area? The explanation above still stands — take it to a local engineer and tell them the code. Knowing it saves them time and you money.

Other Neff washing machine codes

All Neff fault codes and repairs →

What this looks like when it happens

Repairs we cover near you

Written by the engineers at ASAP Repairs, 0115 648 0929. We repair these machines for a living in Nottinghamshire, Derbyshire and Leicestershire.

Neff F18 error — washing machine