Bosch Washer Error Code E42 — What It Means & How to Fix It

What Does This Error Mean?

The E42 error on your Bosch washer means the door stayed locked after the wash cycle ended. The machine expected the door to unlock automatically, but it did not. Your laundry is stuck inside until the issue is resolved.

Affected Models

Bosch 300 Series
Bosch 500 Series
Bosch 800 Series
Bosch WAT Series
Most Bosch front-load washers

Common Causes

The door lock solenoid failed and is stuck in the locked position
Water is still inside the drum — the machine will not unlock until it drains
A power interruption during the cycle left the lock in a frozen state
The door lock module has overheated or developed an internal fault
A software glitch in the control board is preventing the unlock signal from sending

How to Fix It

Wait five minutes after the cycle ends, then try the door handle again.

Bosch washers have a built-in delay of 1–2 minutes after the cycle before unlocking. Give it a little extra time.
Check the display or indicator lights for a drain error. If water is still in the drum, run a Spin/Drain cycle first.

The washer will NOT unlock if it detects water inside — this is a safety feature.
Unplug the washer from the wall for two minutes, then plug it back in.

This resets the control board and often releases a frozen door lock caused by a power glitch.
Use the emergency door release if available. Look for a small plastic tab or loop behind the kick panel at the bottom front of the machine.

Pull the tab gently downward to manually release the door lock. Check your model's manual for its exact location.
If the door still won't open and there is no water in the drum, the door lock assembly needs professional service.

Do not try to force the door open — you may crack the door seal or damage the hinge.

When to Call a Professional

If the door will not open after a power reset and you can confirm there is no water in the drum, the door lock solenoid or module has likely failed mechanically. A technician can test and replace it. Repair costs typically run $120–$280 including parts and labor.

Frequently Asked Questions

My Bosch washer door won't open and my wet clothes are inside — what do I do right now?

First, try unplugging the machine for two minutes and plugging it back in. If that does not work, locate the emergency door release tab behind the small kick panel at the bottom front of the washer. Pulling it down gently should manually release the lock. Check your owner's manual for the exact location on your model.

Why won't my Bosch washer unlock even though the cycle is finished?

The most common reasons are water still sitting in the drum, a power glitch during the cycle, or a failed door lock solenoid. Start by checking for water inside, then try a power reset. If neither helps, the door lock module likely needs replacing.

Can I force the door open on a Bosch washer showing E42?

You should not force the door open — it can crack the door seal or break the hinge. Use the emergency release tab instead. If you cannot find it, unplug the machine and call a technician.