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Miro 13 & 13 Max - How to Troubleshoot & Replace Main Heating Plate / Temperature Display Unit

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  • 12 steps
  • 61 instructions
  • 1 video
  • Updated 2026-04-20

Main Heating Plate Not Heating or Inaccurate Temperature – Troubleshooting and Replacement Guide

  1. 0:02Issue Overview and Required Tools
  2. 0:39Accessing Internal Wiring
  3. 1:10Checking Wire Connections
  4. 1:31Testing Main Heating Plate Voltage
  5. 1:53Testing the Temperature Display
  6. 2:10Preparing to Replace the Temperature Display
  7. 2:41Removing the Temperature Display
  8. 3:10Installing the New Temperature Display
  9. 4:37Preparing to Replace the Main Heating Plate
  10. 5:02Removing the Main Heating Plate
  11. 5:30Installing the New Main Heating Plate
  12. 5:55Technician Escalation
Written steps12

Issue Overview and Required Tools

Watch this part0:02

What you need

  • Multimeter
  • Screwdriver
  1. Identify that the main heating plate is not heating or the temperature reading is inaccurate.
  2. Understand the three possible causes: wire connections, main heating plate, or temperature display.
  3. Power off the machine.
  4. Allow the heating plate to cool to room temperature before proceeding.

Accessing Internal Wiring

Watch this part0:39
  1. Turn off the main power.
  2. Unplug the power socket.
  3. Open the top heating chamber.
  4. Carefully lift the heating plate toward the back.
  5. Only lift the plate when the unit is powered down and cooled.
  6. Be cautious of sharp edges.
  7. Do not pull the plate too far to avoid disconnecting attached wires.

Checking Wire Connections

Watch this part1:10
  1. Gently pull on the main heating plate wires.
  2. Gently pull on the temperature display wires.
  3. Tighten any loose screws found.
  4. If wires were loose, this may have been the cause of the issue.
  5. Turn the power back on.
  6. Check whether the main heating plate is now functioning properly.

Testing Main Heating Plate Voltage

Watch this part1:31

What you need

  • No voltage reading: thermocouple may be damaged and the main heating plate requires replacement
  • Normal voltage reading: proceed to temperature display troubleshooting
  1. If wiring is secure, set the multimeter to read voltage.
  2. Inspect the two thin wires connected to the main heating plate.
  3. Check for a voltage reading.

Testing the Temperature Display

Watch this part1:53
  1. Plug in the power socket.
  2. Turn on the power.
  3. Check if the temperature display turns on.
  4. Reinspect wiring connections.
  5. If the display does not activate, it may need to be replaced.

Preparing to Replace the Temperature Display

Watch this part2:10

What you need

  • Screwdriver
  • Replacement temperature display
  1. Turn off the power.
  2. Remove the powder tray.
  3. Use a screwdriver to loosen the screws securing the side panel.
  4. Remove the side panel.
  5. Take a photo of the back of the temperature display for reference.
  6. Detach the wires from the display.

Removing the Temperature Display

Watch this part2:41
  1. Remove the two plastic clips by pulling them outward.
  2. Slide the clips upward to release the display.
  3. Remove the old temperature display unit.

Installing the New Temperature Display

Watch this part3:10
  1. Install the new display in the correct orientation.
  2. Use the reference photo to reconnect the wires correctly.
  3. Reinsert the plastic clips using the reverse method of removal.
  4. Push the wires fully into place.
  5. Tighten the screws.
  6. Reattach all covers.
  7. Turn on the power.
  8. Verify the display reads temperature correctly.

Preparing to Replace the Main Heating Plate

Watch this part4:37

What you need

  • Screwdriver
  • Replacement main heating plate
  1. Turn off the power.
  2. Unplug the power socket.
  3. Remove the lid.
  4. Open the top heating chamber.
  5. Lift the heating plate carefully.
  6. Confirm the unit is powered down and cooled.
  7. Be cautious of sharp edges.
  8. Take a photo of the wire connectors for reference.

Removing the Main Heating Plate

Watch this part5:02
  1. Loosen the screws securing the wires.
  2. Disconnect the wires as shown.
  3. Remove the main heating plate.

Installing the New Main Heating Plate

Watch this part5:30
  1. Install the new main heating plate.
  2. Reinsert the wires into their correct positions.
  3. Tighten the screws securely.
  4. Reattach the heating plate.
  5. Close the heating chamber.
  6. Turn on the power.
  7. Test the main heating plate for proper operation.

Technician Escalation

Watch this part5:55
  1. If issues persist after replacement, contact a DTF Station technician for assistance.

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