Just got a brand new Bosch series 500 DLX and it is giving me E12 and E27 errors.

Here is what worked...
1. Set the knob to off.
2. Hold down both the Spin Selector button and the Allergy Rinse button simultaneously.
3. While holding these two buttons down, rotate the knob one click to the left, to the "cold" position.
4. At that point, the display will show a diagnostic code and the unit will enter a self-test mode. In my case, the solenoid latch started clicking repeatedly. I pressed the Spin Selector button once or twice, which resulted in the display of new codes and then the release of the latch.
5. I set the knob back to off, and the washer now appears to be operating.
6. You're done.

The code means that the water is taking to long to pump out
unsrew the pump filter at the bottom front right
have some towel ready to soak up the water
clean and replace filter
most times this fixes the fault
if it doesn't then check for a blocked drain hose or faulty pressure switch

A code E27 means a problem with the door lock. Try unpluging the machine for an hour and see if it resets the lock.

If not remove the cover on the lower right corner you will see a white plastic pull cord. Pull the cord and pull open the door. If that doesn't reset the door lock you will need to replace the lock.

turn the dial to the off position. Hold down both the delayed start and spin select buttons and turn dial to the left one click (cold position). you should then here the door unlatch. let go of the buttons. you will see some other codes p 01, p 02. turn dial to off. it should work fine after this. it worked for me. this should be in the manual.

I have the Bosch Vision 500 Series with the E:12 error. My issue was the water inlet valve. When the washer was filling up very little water could be seen coming into the washer and if you just hit the button eventual you would get enough water usually three times during entire wash cycle. Replaced the water inlet valve myself in about 5 minutes very easy. YouTube videos show exactly how to do it. Now the water comes in almost covering half of the front window. Just finished first wash without and problems.

Bosch vision 300/500 dlx series This video will show you how to change the pump washing machine Please remember to subscribe to our YouTube channel for all appliance tutorials
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E27 means there is a problem with the door lock.

Unplug the machine for 30 minutes and try again. If the error code returns you will need to replace the door lock assembly. Open and close the door two or three times to reset the sensor. Sometimes the door has been closed too hard and the sensor reading fails.

Replace the door lock assembly on the washer. Refer to your washer manual for the correct part numbers.

Check to see if your Bosch washer is still covered under warranty. If so, you could receive free replacement parts and service for the faulty door locks.

Hope this helps (remember to rate and comment this answerr).

Im getting an error e13 message and don't know what to do

I just had the same exact problem. Did your repairman ever figure it out?

bosch washer error 27!