I have DeLonghi ESAM3500. The milk is not coming out of the spout. I have tried both covers, after cleaning them well. The steam coming out, but no milk frosted or otherwise.

spout clogged clean with vinegar

Sounds like milk steam apparatus is clogged. Try to disassemble this portion and clean thoroughly. Descaling will not help this section.

You have a pump issue. If it's new take it back and get another one. It's probably not worth trying to replace the pump on your own.

This is preset and cannot be altered.. Do ensure you preheat the milk frother before use.. by activating the "clean" button on the frother jug

use milk can with steam spout

replace o ring ,,, descale ,,, disasemble ,, clean ..

same problem repeated , look back

Delonghi Perfecta won't froth milk or allow hot water to come out from waterspout

Where is it blowing steam from? If it is coming from the milk spout then it most likely that the milk jug is blocked somewhere. If it is coming from where the jug connects to the machine (coupling) then you might need to change the complete coupling (assuming you used the correct orings). The biggest cause of frothing problems with these machines is lack of cleaning of the milk jug. Soak the top in quality milk cleaner for at least an hour and rinse thoroughly. Also run cleaner through it regularly using the milk only function.

The frother does not have a vacuum, it uses venturi pressure to draw up milk through a venturi at the top of the steam feed. The milk side is clogged from not cleaning enough. soak in boiling water for a few minutes and try to run it in steam mode for a while... if that doesnt work, a light lye solution will dissolve the milk residue clogging it. neutralize the lye with vinegar drawn through after the clog is gone.

(lye will dissolve you as well as milk... use gloves and don't put your face near it while it's working.)