We start it and it rapidly increases its speed to max and then shuts off. I have taken it apart and am looking at the speed control switch. Nothing stands out as a problem. I have used compressed air to clean out the slider in hopes it is failing to make a proper connection do to flour dust or something.
I would recommend that you first check the Hall Effect sensor
which determines the mixer’s speed. I had this exact problem and I
actually went out and bought another Hall sensor for about $13. I
replaced the original sensor and made sure that the connection between the
sensor and control board was nice and snug. My mixer worked as good as new! But
I was curious to know if my original sensor was defective, so I put it back in
mixer and again made sure all of the connections were tight. Guess what?
My original sensor also made my mixer work! There was nothing wrong
with the original Hall Effect sensor except that the connection between the control
board and sensor was not snug and tight--unfortunately I didn't check the connection
before I decided to buy another sensor. My guess is that the connection between
the control board and the sensor probably loosens or comes undone over time
from use and vibrations.
1. Download the mixer
parts and diagrams from the Kitchenaid website to see
what the Hall Effect sensor looks like. BTW the part number is 9703312.
2. You'll need a phillips head screwdriver to open up the
mixer gear case cover.
3. Make sure that the connection between the control board
and sensor is absolutely tight and snug.
4. Also, make sure that the orientation of the sensor is
correct. It's difficult to tell which
way the sensor should be connected because the control board has three prongs
and the sensor can attach facing up or down. After you've made the connection,
run the mixer. If it still doesn't work, disconnect the sensor, reconnect it
with the prongs facing the opposite direction and try it again. I
actually found the right sensor orientation through a little trial and error.
But by going through this trial and error, I also had my Eureka moment when I realized that the
original sensor probably would also work if it were reconnected with correct
orientation.
5. This whole process probably takes less than 10-15 minutes
to perform.
6. Finally, use your common sense
and make sure to unplug the mixer before checking, connecting or disconnecting
anything.
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I have the exact same problem. Only one speed-super fast then shuts off
sometimes, sometimes it continues to increase speed until I turn it off.
the same any idea what could be,
Same problem here. Just happened today.
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