SOURCE: my shop vac won't turn back on after emptying
I'm afraid you'll need to take it apart. the switch is mounted in a plastic holder in the top. While you got it apart and without it plugged in, check to see that both brushes are touching the commutator. there should be sufficient spring tension to hold the brushes against the spinning part [commutator] if even one brush isn't making contact it won't spin.
SOURCE: Bosch Vacuum Cleaner: I changed
Greetings from GoVacuum.com,
It sounds like you may have a bad thermal switch inside the machine. Most vacuum cleaners have a switch connected to the motor, so if the vacuum cleaner is running hot, it will shut off to prevent any damage to your motor. You did all the right things by checking the bag, making sure the hose was NOT clogged, and replacing HEPA filter.
Most of the time on canister vacuums, the reason is caused by a clog in the hose, or somewhere in the powerhead. If you're sure that there is no clog anywhere, it is going to be the thermal switch on the motor.
Here's a link to the parts schematic for the Bosch upright vacuum. I hope it helps you in determining how to access the thermal switch. A word of warning to you before you try it, this is a very tough vacuum cleaner to work on, you may want to bring it in to a vacuum repair shop, as this is not an easy repair.
Here's the link;
http://www.essco.net/Customer/SchematicFrame.asp?FileName=Turbo%20jet%20upright.pdf
Please let me know if you have any other questions,
Chris Jones
GoVacuum.com
1-866-468-2288
[email protected]
SOURCE: vacum keeps turning off with warning lights
Actually the problem is that you need to change your control valve. The motor has an internal thermostat on it already so the chances of you burning the motor out are very slim. By changing the control valve, you will solve your problem. Very simple and quick fix.
SOURCE: Central Vac will not turn on.
These problems are nearly exclusively caused by a bad circut board and replacing it is the fix. Bad boards can cause many different effects so its nearly impossible to be sure. The 9v signal wire is not enough to short out an entire unit so it is unlikely the hose. If it is a direct connect system and you are pulling power from the 110 somehow that would cause main unit problems but that is unlikely at best. Sounds like a failed board to me.
Best of Luck
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