When I steam my milk it tastes burnt and there is a strong burning odor.

It is supposed to be like that. You are supposed to steam the milk in a jug with a thermometer in it. The milk is supposed to mix and the bubbles for a tight layer on top.

The actual temperature should be between 120 °F / 49 °C and 140 °F / 60 °C. Milk that is steamed at a lower, steady temperature will have a richer, sweeter flavor profile. If you overheat the milk, it will taste burned, because you've essentially denatured the proteins, preventing foaming and scalding the milk.

Steaming Milk ' ChefSteps

There are videos as well

https://www.google.com/search?q=milk+steamer+wand+correct+temperature

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Please flush the machine with Baking soda solution. Dissolve one heaped table spoonful Baking soda in water. Fill water tank. Flush the solution by dispensing hot water and steam alternatingly until the solution is finished.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a

Hi,
The smell could either be the fan motor or the defrost heating coil...
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heatman101

The boiler is contaminated with milk and needs to be descaled and cleaned.

refrigerant doesnt have a smell hmm only thing I can think off try to look at the light at the top of the fridge did it melt the liner or plastic cause its a common problem with very strong toxic smell

Yikes! that doesn't sound good. Please supply more details as to your steaming technique. In the mean time, I will just say that you should not steam above 150 degrees F or so lest you burn the milk. If you don't have a thermometer, but are using a metal steaming pitcher, keep your hand on the side of the pitcher as you steam. It it gets too hot to touch, you've gone too far. Good luck steaming! And let us know if you are having a different, more specific problem.

Try descaling amchine to clean boiler.

I don't know about the burning business but I had the same problem with the steam wand. the first thing I did to solve this problem was to take small object like a needle or safety pen and insert it into the base of the steam wand. (I have feeling that most problems related to the steaming wand are due to deposits clogging the wand itself.) After I cleared out as best I could I used vinegar and water to help remove any calcium deposits. Sure enough, after inserting the needle into the wand steam began to flow again.

so i guess our expresso you dont have that creamy topping that lack pressure descalcify not with vinegar remove caicium in chunks have a chance of blocking everything descalcifier solution melt the calcium 1part solution 1 part water fill the water with solution open the valve if some come out close it leave the solution in it for 15 minute repeat untill empty rinse very good cheers