When Miele S143 upright vacuum does not turn on what are the possibilities. If no reset button is there a fuse or what other possibilities are there. Bag was full, replaced but it did not restart.

SOURCE: My Miele cat & dog

Will it power up without the hose attached? If it does then you have a clogged hose. If not, there is a circuit board by the motor that may be bad.

SOURCE: Electrolux Epic 6500SR Full Bag sensor working, Does not Reset properly

The problem was a sticking switch that was not being reset. The vacuum on/off switch mechanism is comprised of two switches. One is the main switch that turns the vacuum on and off. The second is a shut off switch that gets tripped when the full bag sensor is engaged. This second switch is supposed to get reset when you push the on/off switch on the outside of the machine. The full bag shutoff switch was stiff and it, therefore, was taking a couple of presses of the on/off switch to move the shutoff switch back into the running position.

SOURCE: Miele S514 Solaris Electro - won't turn on

I don't have the exact same model as you guys, but maybe my situation is similar to yours. My Miele Silver moon model won't turn on one day. I took it to a Miele authorized repair shop ( they all offer free estimate on finding the problem first, then they will tell you what the repair cost will be). They said my vacuum cord reel shim was damaged. The damage was caused by over stretching the cord while I vacuumed. According to them the shim is kind of like a clip that holds the cord inside the vacuum. When the shim is damaged, the cords are pulled apart and electricity can no longer pass through. That would expalin why it won't turn on. The repair cost was not too bad, it costed forty-six dollars. I hope this helps.

SOURCE: Miele 5000 vacuum cleaner stopped during use. no lights on

could be your retractable cord assembly's contacts..

push the power on while pulling out the cord. see if it tries to start.

SOURCE: Kenmore Model 116 upright beltless vacuum, agitator will not turn

I had the same problem. The agitator stopped turning after I sucked up a foreign object (my wife's watch) and it got jammed in the intake. After removal of the watch the agitator did not spin when turning on the machine, and the reset button never deployed (it remained buried in its housing and would not depress with a paper clip). The agitator was not bound and I could manually move it in both directions with ease. Faced with prospect of paying $125 or more for a repair, a good sharp kick to the chassis from the top promptly fixed the problem. I have found that kicking malfunctioning electronics often works.