Why is my karcher window vac blowing out air from the side vents

Check the hoses for clogs due carpet fibers.

If you contact one of the Karcher Centers ( details are on Karcher.co.uk website) they may be able to help.
regards Gary

Have you over filled it and tipped the karcher to one side that sometimes makes warter blow out the vents give it a good shake on its side then try again.

Have you tried to take it all apart just a small bit of rubbish will stop it from working.

Hi. I've just bought the karcher window vac wv50 & am having the same problem finding the serial No. I presume you want to register your product for the guarantee to be valid. I went online Karcher.co.uk & registered mine. You will note that when doing so it does not ask for a serial number but a model No. This is found on the side of box you got the item in (mine is just above the barcode) & it reads something like; 1.633-113.0. Hope you still have the box!

Take it apart and see what is stopping it (the motor) from turning .

I had the same problem and I let the battery run down to stop it cycling on and off. My husband investigated it and found that there is a fault with the on board battery charge sensing circuit. (when the charge is about 10 to 15 % remaining the onboard ic controller cycles the unit on and off, irrespective of the switch. He checked it by cutting wires to the switch and it still cycled off and on so the switch was not faulty.
He put it all back together and said to charge it before it gets too low. If it cycles on and off it probably needs a re charge at that point.
Unfortunately there is no battery level indicator on the tool and nothing to suggest in the manual of what may happen when battery is flattening.
I am taking this up with Karcher as I only used it three times so far and it it was not a cheap gadget. Hope this helps

Hi, I assume you are talking about a central vac. and venting it outside. If so, you can buy a louvre that works like a dryer vent to keep the air from coming in but still allowing the vac. exhaust to vent outside. You can get one at any vac. or hardware stores. Hope this helps, Chris

if you are certain no blockages ? and the dust collector is clear/clean ? have you checked that the outlet filter which is located inside dust compartment is clean/clear this is usually a gauze filter its purpose is - as vac works and draws dust into collector the air that is sucked up thro vac builds up in collector chamber or bag on most vacs? and so for vac to maintain suction the air has to be able to escape to atmosphere/room without dust which is left insude chamber/bag if fitted and so air escapes via the gauze vent as prev mentioned ? however if gauze filter is not clear to vent then vacuuum is restricted due to air drawn being unable to expel sometimes on vacs they will eventually cut off due to o/heat but will operate when cooled so may i suggest checking the above possibility ?

You need to check the filter and make sure it's on all the way. To do this take the top off the vac, make sure the filter is all the way up and in place. There should be a plastic nut to hold it in place. If you are using it for fine dust particles such as drywall dust, you need a special filter for small particles. The filter that comes with the vac just won't do it!