Bosch F34 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 F34 actually means

The machine can't confirm the door is locked shut, so it won't let the cycle run.

On Bosch machines F34 is a door lock (interlock) fault. Before any water goes in, the control board energises the lock and waits for confirmation the door is secured; if that confirmation doesn't come back, or the lock won't release at the end of a cycle, the machine halts and shows F34. You'll usually see it right at the start of a programme, or find the door stuck closed after washing.

What F34 looks like on a Bosch washing machine

Most people find this page having searched for what the machine is doing rather than the code itself. On a Bosch washing machine, F34 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

A failed door interlock — by far the most common cause
Laundry or a stray item trapped in the seal keeping the door off its catch
A worn or dropped door hinge so the door no longer sits square in the catch
A damaged wiring connection to the lock
Control board fault, which is uncommon but does happen

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.

Open the door, clear any clothing caught in the rubber seal, and close it firmly until you hear it click.
Look at how the door sits against the frame — if it has dropped or fouls the catch, that's worth mentioning when you call.
Switch off at the wall for a minute, then power back up and try a short programme.
If the door is locked shut with water inside, run a drain or spin programme first rather than forcing the door.

Common questions about Bosch F34

What does F34 mean on a Bosch washing machine?

The machine can't confirm the door is locked shut, so it won't let the cycle run. On Bosch machines F34 is a door lock (interlock) fault. Before any water goes in, the control board energises the lock and waits for confirmation the door is secured; if that confirmation doesn't come back, or the lock won't release at the end of a cycle, the machine halts and shows F34. You'll usually see it right at the start of a programme, or find the door stuck closed after washing.

Can I fix Bosch F34 myself?

There are 4 checks you can safely do yourself first.

Open the door, clear any clothing caught in the rubber seal, and close it firmly until you hear it click.
Look at how the door sits against the frame — if it has dropped or fouls the catch, that's worth mentioning when you call.
Switch off at the wall for a minute, then power back up and try a short programme.
If the door is locked shut with water inside, run a drain or spin programme first rather than forcing the door.

This one usually needs an engineer once you have tried them.

How much does it cost to repair Bosch F34?

£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 F34?

This one usually needs an engineer once you have tried the checks above. 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 Bosch washing machine codes

All Bosch 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.

Bosch F34 error — washing machine