Why does it have little to no suction power on carpet?

Make sure you have the hoses hooked up properly. Also check that there is no obstruction/blockage in the hose. Otherwise, contact your friend.

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There are much quality differences in belts but the foot pedal with arrow is made to set the hightbecarefully because of easy broken pedals . but if the brush is setting on the deepest stand then its not rotating anymore and the brush stands still. its very easy how you can disassemble the brush and can place them in 3 differend levels in height ? on the grey bearing holders outside of the brush there are 3 different indications l and ll and lll the best is to set so that the carpet if its a thin one the brush must setting just lower then the suction mouth so that the brush are more coming out so deeper come out of this suction mouth so that the suction mouth has made a little more distance from the carpet because when the brush rotate to deep insite the suction mouth .1 the tension of the belt on the brush is lower and .2 the suction mouth sucks vaccuum on the carpet and the brush doesnt rotate because of the force of suction power, play around with the different heights you find the right level.

Pump fault? any filters which can be cleaned?

What I tried and it worked for me is to losen the hose slightly from where it connects to the long plastic tube on the side to allow the little hole to show. What that does is to lessen the suction power a little since the problem is that the suction is too powerful on the carpet and the roller freezes.

Check the lint filter. It is located in the top clear plastic section (the one with the dial to switch from floor to tool mode). On the underside of this section is a small (about 1 inch square) red plastic piece with a little door on it. Flip open the door and you will probably find it is clogged. Clean it out and you should have full suction again.

Sounds like the transmission might need an overhaul. Take it to a local vacuum repair shop and have them look at the transmission.

you might have a leak on the suction side...perhaps the housing is not properly secured, or there is a **** in the black plastic hose.

Its possible that it may be blocked in the foot of the vaccum. try going through your instruction manual to locate details on how to disassemble the suction brush and connecting ducts. If you dont have one then use this link to download it. http://ubermanuals.com/node/1870

Let me know how you got on


Cheers

You say it lost its suction, then you also say this is plenty of suction power, seems you cant figure out the prob. Try cleaning the fan on the suction blower. The blades can get chocked with dust which will give you a reduced suction.