This has happened to me twice. First time it resolved itself - don't know how. This time I could not get the wand unstuck for anything.
Turns out the wand had been inserted slightly twisted in the housing. So the plastic tabs that hold the metal wand in place at place at the top were off-center and turned. You could see a bit more space on one side of the round housing than the other side and that held the wand so tightly it would not budge. This was not visible until I looked REALLY closely at the plastic housing where the wand goes into the machine.
I tried using a wrench to turn the wand but had no luck. Finally I resorted to a short flat-head screw driver and a hammer to tap the side where the tab was stuck until it gave. It took a few gentle taps and the wand centered itself. Works fine now.
So... if this makes sense and works for you, be careful about how you re-insert the wand.
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