I have a Polti lecoaspira 700. When i use the vacuum-cleaner, a cloud of fine dust blows out on top of this machine. Closed it very wel, but can not see where it's leaking. What can I do about this, how to fix this problem ?. André.

It sounds like there may be an issue with the motor of your Polti Vaporetto Lecaspira steam cleaner. The fact that the trigger no longer initiates the motor and that it was making a horrible noise before it failed suggests that there may be a problem with the motor or the brushes that are located inside of the motor.
One thing you can check is the brushes inside the motor. Over time, the brushes on a motor can wear down and no longer make contact with the armature, preventing the motor from running. You can check the condition of the brushes by removing the brush holder and inspecting the brushes. If the brushes appear to be worn down, they will need to be replaced.
Another thing to check is the motor's carbon brushes, which are responsible for creating an electrical connection between the rotor and the stator. If the carbon brushes are worn out, the motor will not run.
It's worth noting that some Polti machines have a thermal fuse, that could have been tripped and that could prevent the motor from running.
If you are not familiar with the process of checking and replacing the brushes or if you find that the problem is more complex, I would recommend contacting a qualified technician or the manufacturer for further assistance. They will be able to diagnose and repair the issue with your steam cleaner, and they can also give you an estimate of the cost of repair.
It's worth noting that Polti machines are known for their durability, but like any machine, they need proper maintenance and repairs.

[email protected] will most certainly give you all the information you need,
good luck
kolbrun

As you have not provided the actual model number of the steam vacuum, I will guess that problem could be with the float which detects water level in the boiler is faulty and giving incorrect water level information in the container. Will need to check if it is not sunk to the bottom.

If this is a bagless machine, then the problem is that the really fine dust that you are picking up from your floor is so small that it is going through the filter and dust cup and building up in your vacuum motor. When enough build up collects, then it starts to blow it out the exhaust. I would bet a paper bagged machine for the long run. They are cleaner,

try this: http://www.spares2you.co.uk/Vacuum+cleaner+spares/Polti+steam+cleaners/PDF+machine+drawings/Polti/Polti++PTGB0002+-+VAPORETTO+2400+drawing.html

Put a couple of lts. of water in the tank, replace lid, assemble hose with tool you require. Plug in switch on, wait for needle to climb into yellow then pull trigger for steam

I suggest using KalStop to remove the calcium and minerals built up in the machine. Polti has built the machines to stop working when there is too much calcium in the boiler to prevent further damage.

Here is a site where you can obtain information or service for your equipment. There is no online support that I can find.
http://www.polti.it/eng/index.htm

Good luck to you.

Are you sure it is not escaping from the top? if so replace top.I have had this myself

http://www.spares2you.co.uk/Vacuum+cleaner+spares/Polti+steam+cleaners/Vaporetto+2400/