Miele Silver Moon - about five years old. We just replaced the HEPA filter, the bag and the thin filter.
Problem: It frequently powers down while vacuuming. We have to notch the power back up - then it powers down again. It's not a hard reset power down with a light coming on - it's a decrease in the electrical setting to nearly no suction at all. A marble passed through the hose and seems to roll around and through easily, so it doesn't look like a hose obstruction.
Thank you JonahBegone!
My 4 years old Silver Moon has been power down off and on for a couple of months, but all of sudden it kept doing it. Then the power won't turn on when I plugged it in ( this turns out to be another problem, see my other posting). I took your advice on taking the hose and handle apart. I unscrewed the 5 screws, but can't pull the handle apart to look inside. I was able to see the 3 metal contact on the hose that you mentioned through a 1/4 inch gap when I forced the handle apart. I cleaned the black stuff off through the little gap by rotating the hose a few times. Then magically, my power down problem also went away. Thank you once again.
Have a Miele Red Velvet which was behaving the same way. It would automatically power down (suction) whether I was using the power brush or hardwood attachment. Read this EXTREMELY HELPFUL submission—took the handle apart and cleaned the three contacts with an electrical contact cleaner and Q-Tip and viola!, it works flawlessly.
Mine was doing the same...powering down. I also cleaned it, as described. worked well for a short time. now it powers down even with clean contacts. I have been disassembling it for more then 4 time for the last year. Got tired and really frustrated. Ready to buy a replacement.
I had the same problem. The problem is loosing the contact at the top part of the handle - where the hose meets the handle. You can try to fix it by opening the handle and putting some ELECTRICALLY CONDUCTIVE grease ( graphite grease or similar) on two rings and contacts you will see there. Undo one screw on the bottom plastic "ring" and pry it out. You might brake little latches on the opposite of the screw, but that would not matter too much. Undo all the screws you can see on the handle and pry it little bit open. I could not open it all the way, but made the gap wide enough that I could use cotton swab and first clean the metal rings little bit and then apply the conductive lubricant. It has been about a year since and it is still working fine, $ 200.- saved :-).
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Could be trhat the variable speed control is going bad. There also is an electronic control by the motor which could be the problem.
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During vacuuming, the unit powers all the way down (still on, but not functioning.) We are foreced to push the '+' button on the handle to get it back up to power. It is increasing in frequency.
I borrowed a friend's hose and handle from his Silver Moon and tried it out on mine - no problem. Power stays on high all the time. Therefore, the problem must be in the hose and handle, probably in the circuitry in the handle used to vary the power.
So... I took the hose and handle assembly apart to take a look. It is difficult to take apart and difficult to put back together, but with patience I managed. (Those are Phillips screws, by the way, and not Torx.) Anyway, there are three metal to metal contacts where the hose fits into the handle, used to trasnfer power to the motor head; these had a blackish sort of carbonized dust on them. I cleaned this off and copied down all the part numbers on the little circuit card in other to order a new one. Put the whole thing back together. Guess what? The problem absolutely went away!
My guess is that the carbonized dust was conducting a little bit and perhaps causing some fault detection circuit to shut down the power. Static guard circuit of some kind? I don't know.
So... I fixed this problem for nothing by taking apart the hose and handle, cleaning it, and putting it back together. Try it!
JonahBegone
This is the same problem I have with my Miele Silver Moon. Would like to know as new solutions come along. I will try the suggestions mentioned here.
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