Question about Nuova Simonelli Mac 2000 Espresso Machine

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The auto fill led light flashes and the boiler shuts down. after about 15 min and doing nothing to the machine it restarts itself and works fine. it does this 2 to 3 times a day

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The machine cannot get water in a timely manner, check the water filter is there is one on the unit it may be time to replace it, and second check the level probe it may need to be cleaned also.

Posted on Oct 07, 2009

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Posted on Jan 02, 2017

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The water pressure should be 15 to 12 psi.If your at 2.1 there is a problem with your auto fill valve.

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By your post im guessing you have a 2 story house.
Have a look at the boiler,water pressure guage.Should be between 12 and 15 psi 140 to180.f when running.
If its above or close to 30 psi the relief valve will open to let off the pressure,we do not want this to happen normally.

If you have high water pressure at the boiler you will need to go to the highest radiator or any one on the second floor and open the bleeder.Looks like this

http://www.ourfixerupper.com/wp-content/uploads/2007/11/cast-iron-radiator-02.jpg

Carefully open it slow into a bucket,let air out until you get a steady stream of water.Do this to all of the radiators,idealy using a bleeder key or needle nose pliers.This may take some time.

Once we can assume all the air is out,check your water pressure again should be 15 to 20 psi.If you have no pressure then your auto fill valve is bad.If you have 15 to 20 then proceed.
Raise the temp of the t stat to start the boiler.6 degrees above whatever the room temp is.
If you still are having problems your t stat may be faulty.If your boiler is at 15 to 20 psi 140 to 180.f and it still shuts down after 3 min your return pump may be bad.

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