For my karcher FC5 - the cleaning water doesn't come out ??
This happened to my FC5 too. I found that the detergent outlet within the suction head was clogged up. This is the receptacle for the brass nozzle you can see when detaching the suction head (by pressing the grey button and gently pulling on the yellow "cover" at the top of the cleaning head - Figures 16.1 and 16.2 in the manual). To check it is indeed clogged, put a few drops of water in it - they won't drain out. To purge it I used the jet from a handheld steam cleaner, and I also used the steam jet to clean the suction slots. Be very careful not to scald yourself, wear gloves, and when cleaning just pulse the jet so as not to risk damaging the plastic parts.
on Dec 29, 2018