Jura Impressa S Model Water Boiler repair/replacment

ID: 146897

Description: The steam valve is located behind the rotary...

Steps:

  1. Always remove the power cord from the wall outlet.
  2. Lift out the coffee tray
  3. Remove the lid sealing the coffee bean container
  4. Remove all of the coffee beans you can possibly remove.
  5. Pull the adjuster of the coffee bean grinder straight up
  6. Remove the four T15 Torx screws
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  7. Remove the cup heat plate.
  8. It can be opened like a book.
  9. Below the cup heat plate there are three more T15 Torx screws. Remove them.
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  10. The top cover is now free. Lift ´er up and set ´er aside.
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  11. Remove the knob for the steam valve by simply pulling it off.
  12. The front cover is secured with a Torx T15 screw. Remove it.
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  13. Now the front cover can be opened like a door for a few inches. The hinge is on the left.
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  14. Various hoses hinder the further opening of the front cover. You need to remove the steam valve keypad from the cover.
  15. Use a spudger to lift the two notches at the top of the front cover a bit to release the keypad at the top.
  16. Lift the keypad upwards and pull it to the back. The steam pipe will slide out from its connection.
  17. All hoses can remain connected.
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  18. Remove the silicone hose leading from the steam valve to the coffee spout. If it is secured with a cable tie which must be removed first.
  19. The front cover is now free and can be opened.
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  20. The first picture shows the front of the unit, the other two pictures the back.
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  21. Loosen the clips on the black cover and carefully lift it off.
  22. Pull out all hose connections. There are small O-rings at the ends, they may also be stuck in the valve body. Remove the O-rings and replace them with new ones when reassembling.
  23. Note exactly where which hose is connected, e.g. by taking a photo, or mark the connection points. In the third photo, the connections are marked (this may also look different on some models):
  24. H = Heating
  25. S = Steam generator on
  26. S = Steam generator off
  27. A= Pressure release valve (elbow)
  28. P = Pump
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  29. Carefully unclip the circuit board with the switches. Caution: the two reed switches (marked green) are made of glass and break very easily.
  30. Release the two latches on the pushbutton board.
  31. Lift the board very carefully by the bottom and pull it off the unit.
  32. The unit is free.
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  33. Loosen the four latches on the steam valve.
  34. Gently lift the steam valve upwards.
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  35. In the next steps you have to be very careful: inside the valve there are two ceramic discs that stick easily. If they fall off, they break easily and are broken.
  36. Loosen the three Phillips screws on the black valve bonnet and very slowly lift it upwards off the valve body.
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  37. Turn the valve bonnet over. The molded seal becomes visible. Make sure that it is seated correctly; it must be seated in the valve body again later, otherwise the valve will not work.
  38. Carefully lift out the molded seal and the two ceramic washers. Note the exact installation position.
  39. Now you can clean all parts. If the seal is defective, you need to replace it.
  40. Pay close attention to the correct orientation when assembling.
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