Quick answer

To replace the power PCB in your North 18K, first confirm your model is DXMA12 or DXMA13, then disconnect power, remove the old board, install the replacement, and test the unit before reassembly.

Why model compatibility matters

The Power PCB North 18K is designed specifically for Duux North 18K units of types DXMA12 and DXMA13. Using it in any other model may lead to improper fit or electrical issues. Always check the model label on your unit before ordering or starting the replacement.

If you are unsure about your model, consult the user manual or contact Duux support. Installing an incompatible board is a common cause of post-repair problems.

Safety first: power and static

Working with electronic components carries risks. Always unplug the humidifier and wait a few minutes for capacitors to discharge. Wear an anti-static wrist strap or touch a grounded metal surface to avoid damaging the new PCB with static electricity.

Work in a dry, well-lit area. Avoid wearing synthetic clothing that can generate static, and keep the new board in its anti-static bag until you are ready to install it.

Step-by-step replacement process

  1. Confirm compatibility and power off: Check the model label on your North 18K to ensure it is DXMA12 or DXMA13. Unplug the unit and wait at least 5 minutes for capacitors to discharge. A common mistake is skipping the model check or not waiting for discharge—both can cause damage or injury.
  2. Open the unit and locate the PCB: Remove the screws securing the rear or bottom panel using a suitable screwdriver. Gently lift the cover to access the internal components. Locate the power PCB, typically near the power cord entry point. Keep screws in a labeled container to avoid mixing them up during reassembly.
  3. Disconnect wiring and remove the old board: Carefully note the wiring connections (take photos if helpful). Unplug connectors from the old PCB, then remove the mounting screws. Lift the board out without forcing any components. A common mistake is pulling on wires instead of connectors—always grip the connector body.
  4. Install the new PCB: Remove the new Power PCB North 18K from its anti-static bag. Align it with the mounting holes and secure with screws. Reconnect all wiring according to your notes or photos, ensuring each connector clicks into place. Check that no wires are pinched or routed near sharp edges before securing the board.
  5. Test before full reassembly: With the cover still open, plug in the unit and power it on. Verify that the display lights up and the humidifier responds to controls. If everything works, unplug and reattach the cover. Testing first saves you from having to reopen the unit if something is wrong.

Replacement part at a glance

  • Power PCB North 18K: Power PCB North 18K is a replacement power board from Duux, suitable for North 18K types DXMA12 and DXMA13. Confirming your model matches these types ensures the board will fit and function correctly, avoiding wasted time and money.

    Power PCB North 18K

    Power PCB North 18K