The steam button on my rancilio espresso machine won’t stay on, it keeps popping out. I have to hold it every time I have to use it. What should I do

Hi Daren,
You could replace the whole steam valve wand but you don't need to.
The rubber grommet inside the steam valve is worn out and the tap wont close properly - that is why the steam is coming out.
You will find these parts with a commercial rancilio supplier.

You will need to get that manometer changed. Get a hold of a rancilio dealer and tell them you need a steam manometer.

First of all, your machine is not safe to use so do not use it. A thermostat maybe have shorted out, a wire may have grounded, who knows. Pull the top off and determine where and what has burned out. It should be quite visible.

Hi
There is a reset button inside on the front side of the boiler (you have to take the top of the machine off. There are 4 screws and remove the water tank). It is located between 2 black wires and is a red button. Push it in and test. There is also another problem that you might have. If the brew thermostat is bad it won’t heat. To test for this, push the steam switch and wait 15 seconds. Then open the steam knob and push the middle button and see if the water is warm. If it is then you need a new brew thermostat. That is the thermostat that has the red dot on the top. It sets on top of the boiler next to the steam thermostat. If you take the top off, make sure that the machine is unplugged.
If none of these things work check the heating element with an ohms meter. The reading in the terminals should be from 12 to 16 ohms. If no reading the elements is bad and you have to replace the boiler.

Remove the top panel and check the 3 thermostat on the machine one of them is not functioning properly, find the wire to the steam switch and trace it to the thermostat.

Hi

There is a reset button inside on the front side of the boiler (you have to take the top of the machine off. There are 4 screws and remove the water tank). It is located between 2 black wires and is a red button. Push it in and test. There is also another problem that you might have. If the brew thermostat is bad it won’t heat. To test for this, push the steam switch and wait 15 seconds. Then open the steam knob and push the middle button and see if the water is warm. If it is then you need a new brew thermostat. That is the thermostat that has the red dot on the top. It sets on top of the boiler next to the steam thermostat. If you take the top off, make sure that the machine is unplugged.
If none of these things work check the heating element with an ohms meter. The reading in the terminals should be from 12 to 16 ohms. If no reading the elements is bad and you have to replace the boiler.

try open steam valve and grised change insert in steam valve

maybe is just air in pump,try prime water on steam wand.open steam valve and press button for make espresso,keep couple seconds

I had the same problem. I took the steam wand off, and checked for steam out of the unit. It was OK, so I stuck a thin wire up through the steam wand and dislodged what look like pieces of a green washer or O-ring.
In short...the wand was plugged.

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.