Milk Steamer takes too long to heat milk. By the time it is heated sufficiently, there is too much water in the milk form the steamer.

I'm guessing this is a table top machine. If so then I take your meaning of "Blowing Off" as in turning off or running out of steam. The table top steamers usually found on home units do not have the capacity to froth large mugs like a "Venti" 20 oz cups. You will have to wait for the boiler to re-heat. It's best to heat a smaller cup of cold milk, pour the milk into the venti and make a 2nd batch again with cold milk. (It's hard to re-froth hot milk).
* check your steam wand tip if it's plugged with old milk. Soaking the wand in warm water overnite will help soften the milk which can be blow out when you make steam again. If you make a lot of milk drinks, it's a good idea to give the wand a blast of steam, then a good wipe with a damp cloth to keep milk residue off the wand.
* It's also possible your steam heater is starting to clog up. If you find that it gets slower and less steam with time then the steamer will need to be replaced. Check your warranty and call for service.
* Please update question with brand and model if you want more help.
Aloha, ukeboy57

There must be a blockage in that steam pipe, I think you need to dismantle the machine and remove all of the steamer parts off the boiler and look for the cause of the problem. Oftentimes it will be old hard milk that has been drawn up the pipe and gone hard from the heat. Once cleaned out prevention by blowing a large amount of extra steam through it after each use is the solution.

My only non professional suggestion is to take off the rubber cover on the steamer and make sure that and the metal steamer itself is clean.

From your message that it is clear that the steam is coming but it is not sufficient to heat the milk, so kindly call the customer care to sort the problem as you can't do it

Thank you.

that means that the steamer is not generating enough pressure steam.

This happens either because there is not enough heat, or if you release the steam when pressure is not enough.

Very common problem with the american maid makers.

bear also in mind that Krups are not the best at frothing milk, and this is also a basic model.

If you want the best capuccino Coffee machine, buy the italian ones, Gaggia, Delonghi, Ariete etc. that are all great at this, or get a bigger Krups as a replacement like the Krups XP405040 that is also good at capuccino

I have the same problem! any fixes? ideas?

please relay on your experience realizing that you now have new steam pipe(with different holes in the end of it and different pressure)
you will need to get use to them and get maximum quality of that steam pipe.
my advice:

1. every time hold your hand in the bottom of milk container, so that you will prevent overheating which often gives the result you mentioned.
2. every time you use cold milk.
   

he trick to this is making sure you have steam comming out of the wand and not water. To do this, make sure you get the steam started before you begin. To get a light foam that will not deflate, hold the wand just under the surface of the milk. You should hear a steady, high pitched noise and you should not hear the splatter of bubbles popping on the surface. Popping noises mean that the wand is too high in the milk and your froth will not hold up. A low pitched noise from the cup means that the wand is too far down in the milk. This will heat your milk (for hot chocolate), but will not give you a good foam. Good luck!

Your steam valve may be clogged. Check out http://cerinicoffee.com/Saeco_vienna_steam_valve_kit.asp

Also make sure your have been descaling and cleaning your machine properly. http://cerinicoffee.com/clean_descale_coffee_equipment_instructions.asp