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Re: replacing micro switch
You have to take of the top, there are several screw to loosen.
Take off the water tank and bean hopper
Take out drip tray and dregbox
loosen the two screw in front where the dregbox and driptray was ( one in each corner)
Take of the plastic adjustment in the right corner (grinder adjustment)
Loosen the screw in chassi where the water tank was, look inside where the beanhopper was to make sure there not are a screw, some models have one there. If there are one you will see that behind the grinder.
Take off the plastic on your steam pipe.
Take off the top.
On the right side near the hole where you put pregrounded coffee, there will be a little microswitch.
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The problem with a constant grinding and overflow of coffee is a micro switch in the doser box needs to be replaced. If you get the top off there is a solenoid in the center of the machine on top that has to be removed. There is a micro switch below and to the right that is bad or dirty and needs to be replaced. This micro switch turns off the grinder when the coffee pushes a arm against the micro switch. If the micro switch doesn't shut off the grinder the coffee overflows the box and falls into the brew unit. This is a very special micro switch that is only a 6 gram switch not like the others that look like it and are a 32 gram switch.
I own a Saeco Incanto Deluxe. It employs the ceramic grinder that has worked flawlessly for 3-4 years. One day it stopped and "Grinder Blocked" appeared. I removed the entire grinder unit, cleaned it thoroughly and calibrated the grinder. This did not fix the problem. After many similar attempts, I found the entire grinder assembly (motor, grinder etc.) online for $149.00. Install of the new assembly took me five minutes and it works perfectly. Please note that the ceramic grinding blades (there are two round ones that must be aligned corrrectly) cost $40 a piece (same site where I found the entire assembly for $149). My suggestion--save yourself the agony and replace the assembly if cleaning and calibration fails.
There is a micro switch on the doser box that is faulty. You need to replace it. They are special micro switches. 6 gram activation instead of the 35 gram switches. Its under the solenoid and there is a lever you have to pull side ways to release it. Lifts straight up.
Hi You have a micro switch on the doser that is in need of a replacement. It is a special micro switch that is just for the doser. It is very sensitive. If the micro switch is not activated the grinder will run until it times out, but the coffee will fill the brew unit and that could break the brew drive.
Hi First off the grinder motors are 110V DC not AC. I would say that your problem is in the micro switch for the doser box under the solenoid. It sounds like it might be stuck closed and that would by pass the grinder saying the the doser box is full and don't run the grinder. You may just need a new micro switch which is specialized.