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My miele medivac will not turn on when plugged in

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It could be either the switch, the motor, or the cord reel. Try plugging it in and slowly feeding the cord in and out while clicking the power switch on and off. If the motor kicks on while doing this, you have an intermittent short in the cord reel.

If you remove the bag chamber lid, (on the s300 series merely opening it until it makes an awful cracking sound, and then lifting it off;) you will be able to access the screws to remove the rear housing. Under the exhaust filter are two screws that will allow you to remove the control unit, and then there are about five screws on the top that will need to be removed if you need to go further.

The control unit contains the switch, which you can test continuity through by using a VOM. If the switch checks out ok, you can test continuity through the other electrical components on the underside of the control unit. If you find a component that does not have continuity, replace it. If they all appear functional, continue with the disassembly:

On the s300 series it is easiest to flip the machine upside-down after removing the top screws, and then lifting the base away from the top housing. This will give you access to the motor and the cord reel.

What can occasionally happen with these cord reels is that they can wear out, allowing too much lateral slop of the actual reel assembly. You can shim this by using something on the axle in the center to push the reel assembly back against the contacts. I use a small rubber "doughnut," but pretty much anything non-conductive will do the trick.

If this doesn't restore electrical continuity, you'll probably need a new cord reel. I highly recommend against trying to do any further repairs on the cord reel itself, as it's a nightmare to deal with... especially if the main spring comes apart.

Any other problems will have to be referred to a repair station, since it could then be either the motor or the motor control board.

Do NOT attempt to test the motor by directly connecting it to wall voltage, as the actual power applied to the motor when it is functioning is stepped down by the circuits attached to it, and attempting to "hotwire" it will fry the motor.

Hope this helps,

-R

Posted on Aug 01, 2008

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With it plugged in, do you see any lights on the control panel?
Miele also has a little device, that let's you 'park' the floor want in a neat little slot at the handle end of the machine-- and when it is plugged in there, the machine shuts off.

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When a Miele canister just stops working all of a sudden, it's usually a pretty clear indication that either you have a bad cord reel, or a bad switch. I would say that in 60% of Miele repairs that I do with this problem, the cord reel has gone bad.

One easy thing that you can try to see if the cord is bad, is put one hand on the on/off switch, and the other hand grab the cord (making sure it's fully retracted inside the canister). Now pull the cord out slowly with your one hand, while continously turning the switch on / off, on / off. Keep pressing the switch on and off while pulling on the cord. Usually if the cord reel has gone bad, then you may hear the vacuum attempt to start, or even turn on while you're pulling on the cord. The cord reels in Miele use a metal spring inside that makes connection with the rest of the vacuum. Over time this spring will start to loose it's strength, and eventually will get so bad that it no longer makes contact with the rest of the vacuum. By pulling the cord out slowly and pressing the on / off switch, a lot of the times the spring will make connection somewhere, and the motor may turn on temporarily.

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http://geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=761462
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I'm using Miele Medivac vacuum
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http://miele.com/
Customer Service, Repairs, Parts 1-888-785-2828
Mailing address listed below:
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9 Independence Way
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