STEAM EXIT!

Moin together! have a problem with the Siemens Eq6 Series 300! After switching on there is recently a very loud "gurgling noise", then follows an extreme amount of steam from the output nozzles and then rises a little steam / Qualm from the vents next to the bean filler cap! No smell of cable fire or the like. After about 45 seconds, the spook is over and the KVA works as usual reliable! Would be happy if someone has an idea! Oh yes, almost forgotten, the machine is just under 4 years old and has always been maintained by me regularly and lovingly!
Thanks already
!

Descale the machine properly, not with the cleaning program. Double descaler pure, then draw hot water, turn off the machine and leave overnight. The next morning, draw hot water a few times, clean the tank and flush the pipes a few times with hot water.

could be that the flowmeter is defective.