Delonghi perfecta milk not hot - DeLonghi ESAM6600 Espresso Machine

SOURCE: I have a Delonghi Magnifica

I purchased a unit second hand for my wife's birthday today. It's only 4 months old, got it home, tested it, same problem... No froth!

I've read all the posts here and all were very helpful troubleshooting guides however they did not solve the issue.

Understanding how the frothing mechanism functions is half the battle in figuring out the solution. It's a simple vacuum type system. No doubt you've read about checking the orings. This is definately the first thing to check however if this is not the reason then consider the following.

The larger of the white tubes that has the red and black oring inserts deep into its port on the tap. Why? It pushes steam past the milk pipe directly into the chrome frothing tube which causes a vacuum essentially drawing milk up it's hose creating the froth. What you can't see without further investigation is that on the underside of the tube centered between the red and black orings is a small hole. This hole is responsible for drawing the milk upwards. If this is blocked, and it probably is then no milk and no froth. Use a really small screwdriver to carefully clean the white tube both from the front and the little hole underneath.

So in conclusion. Any air leak between the red and black orings will prevent the vacuum required to draw milk up the tube and alternatively any blockage of the milk channel will also obviously prevent the flow into the frothing mechanism. Hope this helps.

SOURCE: DeLonghi Perfecta ESAM5500 when trying to make a

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.

SOURCE: my delonghi perfecta plus says

Hi,

According to your problem, the 'Close Door' message indicates the service door is open. So first make sure that the service door is closed perfectly. If the service door is closed but you get the same error again then check the infuser is inserted correctly.

Open the service door

Remove the drip tray and the grounds container and clean it. Unlock the infuser and pull it out.

Wash the infuser under running water, without using detergents.

Clean the inside of the appliance thoroughly. To remove coffee encrustations from the inside of the appliance, scrape with a plastic or wooden fork, then vacuum up the residues with a vacuum cleaner.

Replace the infuser by sliding it onto the supports and pin at the bottom, then push the PUSH symbol fully in until it clicks into place.

Then close the service door perfectly. If it doesn't solve your problem then reset the settings of the machine. It will solve your problem.

SOURCE: the door to my DeLonghi

I hope you have solved this problem by now... The door not closing properly happens when coffee grounds build up in the middle of the machine. It tends not to get everything into the waist box. You need a chopstick to fish out the grounds from behind/under the central column of the machine. You'll find a lot of coffee packed in! Then the door will close.

SOURCE: How do I descale my Delonghi Perfecta? Can't

The manual is no longer available at that link. It's better to post an answer than to simply point to a URL...

The answer:

1. Fill the tank with descaling solution (or a vinegar solution, which voids your warranty, but seems to work well...)
2. Power on.
3. Hit the P button (Program). The display changes; instead of the usual icons, you will see the "clean" icon, which looks like rain drops in a circle. (This is for rinsing the coffee drip spigots). Turn the selector wheel to switch to it an icon that looks like a bunch of dots between two vertical bars. This is the "descaling mode."
4. The bottom left button now says "Esc" next to it, and the bottom right is the OK. Hit OK to confirm you want to descale. Then dump the drip pan and put a large container under the WATER spigot (not the coffee drip spigots.) Your descaling solution will come out hot and hard. The machine may pause and re-heat at times, to make sure it's very hot. The solution is hot and acidic - BE CAREFUL! It will go through the entire tank, so use a big container, or be ready to switch it out - or put your machine over the edge of your sink for the job.
5. When the tank is empty, the machine will ask for a refill - this time give it clean water for a rinse. Hit the OK; the entire water tank will be used to rinse.

That's it!