I have lindhaus DP-5 vac - I think the on/off switch needs replacement. Do you have a part number and instructions?

If it screws in it will be reverse threaded. Screw to the left tight....right loose.
Hope that's how they make them most vacuums are that way.

Are you sure that the filter is pushed all the way to the bottom of the container? Just take it out and put it back and make sure the filter retainer is gently turned all the way.

Sounds like you have some form of an obstruction in the hose ( i once found a tooth pick sideways in mine) most models allow for the hose to be disconnected from the vaccum itself, also make sure theres not a setting for attachments also, some models need the suction redirected.

I got a replacement switch at a local electronic supply store: Philmore Miniature Rocker Switch part number 30-043. Shop vac changed the switch recently to two push buttons from the old rocker style. This update works a lot better.

Maybe one of the wires that leads to the power head?

i have never heard of any belts in a vacuum cleaner

Make sure that the on switch is in the upright position. Down won't give you give you suction when vacuming.

Make sure that the hose is securly in the lower part of the vacuum.
Test the hose with your hand before you put it back to see if you're getting air sucked in through hose. If not it must be clogged up somewhere. You might contact Lindhause home base.

I just went through the same problem with a Shop Vac. The switch is easy to replace but not easy to find. After removing the switch, I found a match made by Sigma Switches. They directed me to contact a local RV dealer and look in either their Coast Supply or Stag/Parkway Supply catalogs for the appropriate switch (an H2-28 in my case for a QPL45 Shop Vac). After ordering the switch and $5 later, it snaps in like the original with no problems. Certainly beats $70 for a whole new motor assembly.

http://geeksquad.fixya.com/ThreadView.aspx?prdid=19255&thid=245090
Shop Vac 12 wet dry canister
Posted by Fa Fa on Nov 05, 2007
I'm not certain I have all the parts to my Shop Vac. I have no instructions so I need help describing how it works and a picture of the main parts.
Thanks for any help. Julia Harris

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. I am supplying you with the contact for the Shop Vac Factory Service for owner’s manuals listed below: for the website and the customer service line, but make sure you include the Shop Vac Model # and the Serial # as well. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions.
http://shopvac.com/contact.asp Customer Service 570-326-0502 Phone #
Shop-Vac Corporation Customer Service 570-326-7185 Fax #
2323 Reach Road
P.O. Box 3307
Williamsport, PA 17701
Hours are: Monday thru Friday 8:00 am to 5:00 pm (EST)