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Bosch Vacuum Cleaner: I changed bag. Cleaned out all suction hose and hepa filters, however, my 1450 w 12 amp upright vacuum cleaner will die after five minute run - overheating. Please advise.

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  • zenman88 Aug 27, 2008

    Thank you for the great advice.

    Your last caveat:"...this is not an easy repair." made me decide to put down my screwdriver and take it to the local repair shop.

    Just as you said, the thermal switch was replaced. The repairman said that it was one of the toughest machines to work on. Had you not warned me, we would still be looking at a dismantled vacuum cleaner on our dining room table.

    Thanks again, Chris.

    ZMan

  • tina_thames Mar 28, 2009

    I have the same exact vacuum and problem. I was wondering how much the repair cost?

    Thanks,
    Tina

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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
chris.jones@govacuum.com

Posted on Aug 18, 2008

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