Decent Espresso

How to Replace the P6 Sensor



Youtube video


In this video, we'll show you how to replace the P6 sensor.

When reassembling the group head parts after cleaning, if the lower group head part is not properly aligned while tightening the shower screen screw, the sensor probe can get caught between the upper and lower parts and may eventually break. Avoid this by placing the machine upside down when installing the group head parts.

When this sensor is broken, it causes an incorrect metal (group) temperature reading and needs to be replaced.

This video is part of a series that we produce, helping our users self-repair their Decent Espresso Machine.

  • Only do this repair in consultation with Decent tech support
  • Doing otherwise might break your machine or void your warranty.

Chapters

  1. 00:12 Tools
  2. 00:17 Power Disconnection
  3. 00:37 Remove External Components
  4. 01:19 Remove the Main Cover
  5. 01:41 Remove the Chassis
  6. 02:10 Turn the machine upside down
  7. 02:40 Remove the 5 screws on the group head support
  8. 03:06 Turn the machine back into its upright position
  9. 03:14 Lift the group head cover and insulation plate
  10. 03:39 Remove the sensor bracket
  11. 03:59 Remove the old sensor
  12. 04:10 Disconnect the sensor cable and remove cable ties
  13. 04:37 Pull out the old sensor cable
  14. 04:57 Install the new sensor
  15. 05:29 Connect the new sensor cable
  16. 05:59 Mount new cable ties
  17. 07:00 Organize insulation plate and cables
  18. 07:12 Mount the group head cover
  19. 07:26 Install the side chassis
  20. 07:50 Place a cloth and turn the machine upside down
  21. 08:04 Insert and secure the screws in the group head support
  22. 08:31 Contact us if you have any questions

P6 Sensor Replacement Instructions

Tools Needed

  • T10 Torx screwdriver
  • Angled pointy-tip tweezers
  • PH1 Phillips head screwdriver
  • Nippers
  • Cable ties
  • Cloth
  • Comfort grip gloves

Step 1: Power Disconnection

For DE1XL or DE1XXL Models:
  1. Remove the back panel.
  2. Turn off the machine's back switch.
  3. Unplug the power cord.
For DE1PROand DE1PLUS Models:
  1. Turn off the machine's back switch.
  2. Unplug the power cord.

Step 2: Remove External Components

For Version 1.43 or Higher (Slide-in Tablet Stand):
  1. Unplug the USB cable.
  2. Gently pull the tablet stand out.
For Version 1.3 to 1.42 (Screwed-in Tablet Stand):
  1. Unscrew the three screws holding the tablet stand.
  2. Remove the stand.

Then…

  1. Remove the drip tray.
  2. Remove the drip tray cover.
  3. Lift the lever on the back of the machine.
  4. Slide the water tank out and remove it.
  5. Remove the portafilter.
  6. Remove the group head handle.

Step 3: Remove the Main Cover

  1. Use a T10 screwdriver to remove the 8 screws securing the main cover.
  2. Gently stretch the sides of the cover outward.
  3. Lift the cover off the machine.

Step 4: Remove the Chassis

  1. Identify the screw type for the manifold (T10 Torx or PH2 Phillips).
  2. Remove the 6 screws securing the chassis.
  3. Remove the side screw of the boardroom lid (T10 or PH2).
  4. Remove the lid

Step 5: Open the Group Head Cover

  1. Place a soft cloth on the table.
  2. Rotate the steam wand to a horizontal position.
  3. Flip the machine upside down and place it gently on the cloth.
  4. Use a T10 Torx screwdriver to remove the 5 screws located under the group head.
  5. Use angled tweezers to pull the screws out after loosening them.
  6. Flip the machine back to its upright position.
  7. Lift the group head cover straight off.
  8. Lift the bottom insulation plate to access the interior components.

Step 6: Disconnect and Remove Sensor

  1. Use a PH1 screwdriver to remove the 2 bracket screws.
  2. Use angled tweezers to pick up the loose screws.
  3. Pull the sensor head straight out.
  4. Unplug the sensor cable from the manifold PCB using tweezers.

Step 7: Remove Cable Ties and Old Cable

  1. Use nippers to cut the cable tie securing the blue and black sensor cables.
  2. Cut and remove the cable tie securing the cables and the black tube.
  3. Pull the sensor cable completely out through the group head hole.

Step 8: Prepare and Install New Sensor

  1. Use a T10 Torx screwdriver to remove the old O-ring from inside the connector.
  2. Place the new O-ring on the new sensor probe.
  3. Insert the new sensor and secure the bracket with the two PH1 screws.

Step 9: Connect and Secure Cables

  1. Feed the cable connector through the group head hole in the chassis.
  2. Plug the connector into the manifold PCB.
  3. Use a cable tie to secure the black and blue sensor cables together. Trim the excess.
  4. Use a second cable tie to secure the cables and the black tube together.

Step 10: Close the Group Head

  1. Tidy up the insulation plates and ensure all cables are properly positioned.
  2. Ensure the ground cable is not pinched between any metal parts.
  3. Slightly tilt the group head back.
  4. Insert the rear tab of the chassis into the group head opening.
  5. Gently close the group head.

Step 11: Install the Side Chassis

  1. Install the side chassis.
  2. Secure it using all 6 T10 or PH2 screws.

Step 12: Secure the Bottom Screws

  1. Place a cloth on the table.
  2. Use a thick enough cloth to support the group head evenly. If necessary, fold the cloth to increase its thickness.
  3. Flip the machine upside down again.
  4. Insert all 5 bottom screws.
  5. Start with the top left or right screw for initial alignment.
  6. Adjust the group head angle as needed for proper alignment.
  7. Screw in the first 4 screws only halfway.
  8. Fully tighten all 5 screws once they are aligned.

Step 13: Final Check

  1. The repair and reassembly are complete.
  2. If you have any questions or issues, please contact our support team.

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Updated 2025/10/06