My Karcher 2.300 won't power up. Have checked power source and plugs which are ok. It was running fine yesterday

SOURCE: car was running fine yesterday, its cold outside

try using your spare key might be the anti theft sys kicking in

SOURCE: Lights and clock are off, no power. Power sources checked, fine.

start by checking fuse

SOURCE: Machine stopped at rince cycle.

Hi from retired Englishman in SW France,
(no promises but try this!)
I would gently suggest as a first step that you clean the drain motor lint tray/filter. So many 'faults' are caused by blocked filters and many machines will not even go to spin or release the door lock if there is any water still left inside.
Here are my complete guidance notes for checking both the drain motor filter and the drain motor ;-0)
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If you are unsure where the filter is, it is often behind the front lower (kick) panel (or in some machines at the rear in an awkward position!) and most are held in by a round cover/knob. Sometimes the filter will not come out with the cover and you will have to persuade it to come out to play!

REMOVE POWER AND ENSURE YOU HAVE A WATER RECEPTACLE/RAGS TO SOAK UP THE WATER WHICH IS BOUND TO POUR OUT!
It's surprising what people have found in theirs! It is always worthwhile checking it on a regular basis.
Now- whilst the filter is removed it is normally possible to see the drain motor and ensure it is not jammed by a foreign object such as a needle or a toothpick. It should be able to be turned by hand/finger- the power IS OFF!
At this point it is also possible to test if the motor works. No clothes or water in the machine, select a spin cycle and put the power back on. You should be able to see the motor turning at some point, possibly straight away. Using something suitable like a glove see if it is easy to briefly slow the motor down. If it is easy then the motor is malfunctioning!

If this has assisted you please consider a 4 thumbs up for the rating.
Thanks and good luck!
John C

SOURCE: My roper dryer worked fine yesterday. It won't work today

remove back cover then locate the blower housing in the back,its round on this is a thermal fuse appx. 1" X 1/4" with 2 wires from it,this is the thermal fuse test it,if its open on continuity its bad and the dryer wont operate the pat number is FSR# 3392519