This instructable will walk you through the steps required to remove the beeper.
Warning: The steps involve opening up the dishwasher control panel area, and will expose you to AC voltages which can injure or kill you. Please use caution, and unplug the device or turn off the appropriate breaker.
You will also probably invalidate the warranty -- although, you will be able to replace the beeper if you need to call in a repair technician.
The overall steps are:
1. Disconnect the power
2. Locate control panel
3. Remove control panel cover
4. Remove plastic PCB cover
5. Locate beeper
6. Remove plastic beeper cover
7. Remove piezoelectric disc
8. Set aside piezoelectric disc
9. Put things back together
I first found a description of how to do this in an Amazon review of a similar dishwasher.
1. Phillips head screw driver
2. Flat headed screwdriver or dull knife
3. Stool ( or other portable surface about 24-30 " high)
Step 1: Disconnect the Power
Tip: If you hear the beeping, you didn't do this right. Don't continue if don't do this step.
Warning: Please do this before proceeding. I'm not responsible if you hurt yourself by messing with wires in an appliance that uses lots of water.
Step 2: Locate Control Panel
Note: The dog shown in the photo is not the dog afraid of the dishwasher.
Step 3: Remove Control Panel Cover
The goal is to remove the plastic control panel area appears at the top of the front of the dishwasher door in the first photo.
At this point, carefully remove the eight screws indicated below.
1. Locate the eight screws.
2. Remove them carefully. Be careful not to drop the screws inside the hollow dishwasher door.
3. Once you remove the screws, gently pull the cover off and rest it on a stool or small table, the wiring will be exposed and will tether the control panel cover to the dishwasher door. Don't leave it dangling.
Warning: There is a VERY sharp edge running along the edge of the stainless steel door. Don't cut your finger as I did.
Step 4: Prop Up Control Panel, Remove Plastic PCB Cover
1. Remove the two screws from the plastic PCB cover.
2. Remove the PCB cover.
Step 5: Locate Beeper
Step 6: Remove Plastic Beeper Cover
Using a flat headed screwdriver or dull knife, pry the plastic cover off of the beeper, exposing the piezoelectric disc.
Note: The disk MAY come out when you remove the cover.
Step 7: Remove the Piezoelectric Disc
Step 8: Set Aside Piezoelectric Disc
These things can be used as a microphone or speaker.
As tempting as this may be to harvest this goodie, you may want to set it aside to return to the dishwasher in case you need to contact a dishwasher repair technician.
Step 9: Put Things Back Together.
2. Replace the plastic circuit cover, using two screws.
3. Gently press the entire control panel back into place.
4. Replace the two flat-headed screws near the latch.
5. Replace the six flat-headed screws holding the control panel in place.
6. Restore power. (Plug the dishwasher back in, or turn the breaker back on).