I have had similar issues with my 40729. Assuming that when you turn on the steam switch, the steam light goes on and then off when up to temp: I have resolved this by filling my steaming pitcher with boiling water, remove the end-cap from the frothing wand and soak the end of the steam pipe in the hot water for several minutes. Then fire up the steam and blow it out. if the obstruction is more serious, then you may need to unplug the machine and run a thin and stiff wire ( like a guitar string ) up through the wand to break up the clog.
This unit uses one heater for both the extraction and the steam, so if you are getting extraction then the heater is good. You may also have either:
a bad needle valve in the steam knob on the right.
a bad thermostat that regulates the heater temp when you turn on the steam switch.
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put a solution of 10% vinegar in it and try to flush the system out.... probably that circuit, which pushes a shot of water into the heating coils, is plugged.... if REALLY plugged, you may be looking for a new iron since passage of water with the vinegar is necessary to dissolve the clog to a great degree...
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.
First you should remove the end tip of the steam hose and try to clean the steam holes with a pin. The steam should come frealy withou the end tip. If not then you shoul desasemble the steam tap , clean it and put it back together. The problem is only caused by dry milk or milk with chocolate. Even if you manage to have some steam then the problem can be solve by using the steamer warming just water in a glass and leave it all nigh long inside the boiling water in glass this will meld the dirt and will gos away.
This unit does not use the pump to generate steam, so if the pump is bad (motor works but the pump it drives does not transfer water) you will get steam but no water through the head to the portafilter.
The unit is not user serviceable and at $68 to buy a new one, it is for the most part, disposable.
The pumps on this unit do not like to be run dry as they rely on water as a lubricant. Without water in the reservoir, the pump may fail in a short running time.
hello take the pipe put it in a solution of calcium remover leave it in for a couple a day calcium in pipe is like concrete after a day or so try to pass a steel wire in it the calcium gonna get softer everything gonna come of after take the same product fill the machine run the machine with it for a good clean up most of the people loose good expresso machine because of hard water a clean up every few month it gonna work good and our coffee gonna be warmer .p.s when you use special cleaner rinse the machine very good the cleaner is very corrosif cheers
Ran into the same problem on mine just after using the steam, so it definetely wasn't clogged... hope this helps.
Just try running the expresso maker through a full cycle and then try the steam again. Not sure if the machine air locked or something, but the expresso cycle appeared to get the water flowing again and then it had no trouble producing steam.
When you turn on the steam switch, does the steam light turn on, then eventually turn off when it comes up to temp?
If so, your wand may be plugged with a dried plug. I have resolved this by pouring boiling water into my steaming pitcher and soaking the wand for several minutes, then fire up the machine and heat for steam, then blast it out.
Might take a few tries. You may also need to run a thin wire, like a guitar string, up the wand to help free up the plug.