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If the hot water comes out of the steam pipe but no coffee, then the riser pipe in the boiler may be clogged. These instructions show how to open the boiler and remove the blockage.
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You can find the model designation SIN017 on the bottom of the machine.
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Pull off the steam valve knob. To do this, you must pull hard.
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Remove all attachments, i.e. the water tank and the drip tray.
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Pull off the Cappucinatore.
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Unscrew the two Phillips screws on the back.
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Lay the machine on its side. Unscrew the two Phillips screws at the front of the underside.
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Lift off the top cover and set it aside.
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Do not remove the cover completely. It is connected with many cables. You may be able to disconnect the yellow-green cable from the hot plate, then you have more room to move.
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Here is a view into the opened machine. The components are clearly visible:
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Pump
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Boiler with thermal switches
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Steam valve
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Lay the machine on its side. Unscrew the four 8mm cap nuts on the portafilter holder.
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The bracket is loose, but only goes out the top.
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The steam pipe is inserted into the steam valve, but is held in place by a clamp. Pull out the clamp.
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Pull the steam pipe downwards.
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Place the machine upright again.
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Unscrew the four 8mm screws holding the boiler together with a suitable nut. You may need to counter the nut underneath with an 8mm open-end wrench.
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Detach the upper half of the boiler. Pay attention to the cables and hoses.
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Now you can also lift out the bottom part of the boiler completely. Make sure that the holder of the portafilter rests on four nuts.
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Now is also a good time to check and possibly replace the portafilter seals and the brew screen. Coat the seals with food-grade silicone grease.
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The calcification of the riser pipe is clearly visible.
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First, try to pierce the buildup using a wire.
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Then place the entire bottom part of the boiler in descaler, preferably amidonic sulfonic acid, for a while. Help with the wire until the tube is completely free.
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If you blow very hard into the riser tube from the top, it should be unblocked a little bit.
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Work through the steps in reverse order to reassemble your device.
Work through the steps in reverse order to reassemble your device.
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