A very interesting Saturday where I had this Karcher Steamer machine which turned on, detecting water level but not able to warm it up.
After a bit of thinking I have decided to open it and try to find the issue on this simple system, maybe a fuse? Maybe a broken part? It must had be very simple!
I had to follow each cable and understand how it worked:
The controller is powered up and checking if the water is present, if not a light turns on and the pump doesnt turn on.
When the water is present, a pressure detection of 2.1 Bar is taking care to turn on and off the heating element.
When then temperature goes low, the switch turns on the pump that allows the water to be pumped inside the heating system.
Luckily my issue was very simple, I have tested the pump and few connections but nothing was broken or burnt. What I didnt actually check is the long run cable where a female connector wasnt secure inside the pin which controlled the whole heating and pump system.
Put all back together and I had my steamer machine working without buying a new one or contacting the support.