Milk frother /steamer not working

Here are some possible reasons why the milk steamer flow is diminished and steam is not coming out of the bottom of the machine:

Clogged steam wand: The steam wand might be clogged with milk residue, which can restrict the flow of steam. Try cleaning the steam wand with a damp cloth or a pipe cleaner.

Faulty steam valve: The steam valve might be faulty or damaged, which can cause a decrease in steam pressure. In this case, you may need to replace the valve.

Blocked milk frother: The milk frother might be blocked with milk residue, which can prevent the milk from frothing properly. Try cleaning the milk frother with a damp cloth or a pipe cleaner.

Faulty milk frother: The milk frother might be faulty or damaged, which can cause a decrease in milk flow and prevent proper frothing. In this case, you may need to replace the milk frother.

If none of these solutions work, it's best to contact DeLonghi's customer service for further assistance

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

This might not be the problem , but sometimes , not cleaning milk frother tip properly , the tip gets closed with dry milk. use a needle and push it in the frother tip and see if there is a restriction. hope this helps.

Take off the end bit; it unscrews. Poke a needle through the hole; I find it gets blocked quite regularly. While it's disconnected turn the knob on the right. Steam should come out. If it doesn't there is a blockage inside the machine and you need to get inside it to fix it. But the only blockage I've had is in the end bit.

I've also had this problem with the Krups 'Il Primo' - reduced steam for frothing of milk but plenty of espresso.
Diagnosis: over many uses, a residue of dried milk plugs the interior of the steamer tip.
Fix: Using a small adjustable wrench, remove the tip. Clean it inside and out with a tooth pick. Reattach the tip - gentle with the wrench.

Had this exact problem a few times on a cleaned well maintained milk jug top with an ESAM5500M. Delonghi 'repaired' it by sending a new milk jug frothing top.

It's caused by milk fat deposits, the frother part on the milk jug may look clean but deep inside it's not. I clean mine with pipe cleaners, detergent and hot water and still it wouldn't froth.

The problem re-occurs for me every 6 months or so. You could buy the milk fat remover solution to clean it. Personally I just boil the whole milk jug frother in detergent and the again in descaling solution, that's fixed this problem twice now, although I think it will eventually corrode the 'o' rings on the frother, still cheaper than buying a new frother part each time though.

If it still doesn't work after that, the only other reason for this problem I found mention of was caused by a broken rubber seal where the milk jug fits to the machine. It's most likely to be milk fat deposits inside the frother though.

try inserting the frother in hot water its probably block and for our water everytime you whant steam open vale boiler start to boil water let the water drip into the tray wait untill steam come out pierre

a. Possible air in the system. Switch to hot water iso steam, let warm water pas for a minute by turning the knob fully open. Stop tapping warm water (close the knob) and switch the machine to steam iso water. Try to get the steam by fully opening the knob (pump should start running). 
b. Solidified milk in the system blocking internal tubes. To avoid this always purge the system (shortly open the steam to an empty cup or a towel) after you steamed milk to avoid milk being sucked back into the system due to condensation of steam (this creates a vacuum and reverse flow). To resolve the blocked tubing: clean the nozzle and try flushing the system (tapping warm water). 

What position do you have the knob in? According to your manul it should be in position 9 not in position 8 for steaming.Good Luck.