Milk container head ESAM 6600 or 6620

Hello everyone
, I have a problem with my De Longhi
6620 when cleaning up milk.

Machine no longer sucked

milk while foaming.

So

I switched the connector.

Everything ran without problems, the machine delivered five covers of

milk foam without any problems.

With the sixth cover only a loud buzzing and one thought the

machine takes off immediately.

So the connector was removed again and with horror it was found out that it looked inside as if it was fused inside and

has

no more water

or milk

passages

.

Strange also the grey discoloration in the lower part of the lower connector, as if descaler

has acted

too long on the surface of the connector

.

Could it be that I

'm using the

wrong milk container

?

I can

't see

any difference between the covers of a 6600 or 6620

.

Thanks for all

the clues.

LG:Jochern