Bosch Classic 1200 not working key sign stays on

Control panel will have to be accessed to see why it’s not depressing. May need new control.

The key symbol indicates child lock has been set.

Press and hold the start button until the key symbol goes out.
You should then be able to use the appliance.

They aren't very complicated machines. Unplug and remove the back. Look for trapped clothing, broken belt or something that seems out of place. If it all looks normal you could have a bad circuit board (but if that's the case the machine should throw an error code) Cheap on EBay and easy to replace. Mine was $45 and took less than 10 minutes.

Bosch classic 1200 wfo246 This video will show you how to change the pump washing machine
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You need to press 2 buttons simultaneously for 3 to 7 seconds. Look for a small child's face or a lock icon (Sometimes both) on the Facial panel, there will be arrows pointing from that icon towards 2 buttons, these are the 2 you need to press.

Hope it helps

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To start a cycle when the child lock has been activated you have to keep the start button pressed for a least 5 secs. Check your user manual for deactivation of child lock.
If you don't have the manual, use the link to download a copy, you will need the Enr number from the sticker on the inner door.
http://www.bosch-home.co.uk/quick-links/customer-service/download-product-manuals.html

Power on, press the start button for 5 or 6 seconds, the sign will go off. Try the door gently.

You mean you cannot find your key??

Sure we know, but rate me 'very helpful' for the free help, thanks

Possibly a blocked filter or pump.
Ths filter should be at the bottom right front of washer, sometimes behind a removeable cover at the bottom of washer.
To clean it, unscrew anti-clockwise, remove and clean.

try utube video