Smart Combustion Motherboard & Cover Replacement Instructions

How to replace the Smart Combustion Motherboard Housing and the Smart Combustion Motherboard Housing Cover on your touchscreen Traeger pellet grill.

Related Articles

• About the Smart Combustion Motherboard
• Wire Harness

Applicable Part Numbers

The instructions outlined in this article apply to the following SKUs:

• Smart Combustion Motherboard Housing:
  • KIT0750
  • KIT0751
  • KIT0827
  • KIT0828
• Smart Combustion Motherboard Cover
  
  • KIT0726
• Power Supply Board
  • KIT0722

How to Replace the Smart Combustion Motherboard Housing

IMPORTANT: Before proceeding

To continue you'll need to remove your hopper service panel. To remove this panel for the first time, you'll want to use an impact driver to remove the screws behind the P.A.L rail on your hopper service panel. 

1. If this is your first time removing the hopper service panel and you don't have an impact driver of your own. Contact our customer support team and we'll send you a complimentary manual impact driver.
   • If you already have a manual impact driver, proceed to removing the hopper service panel.
   • If you have already removed the service panel screws, you can disregard the impact driver and use a regular Phillips screwdriver.
2. Once you've removed the screws using the impact driver, continue with the next steps outlined here in this article.
    

1. Remove the hopper side service panel using a manual impact driver to remove 6 screws (2 located on top of the access panel, 2 below the hopper side rail, and 2 on the bottom of the access panel).
   • Pro Tip: Some customers find this easier if they remove the P.A.L Rail first.
2. Remove the smart combustion cover by unscrewing the 4 screws securing it in place.
3. Unplug the AUGER, FAN, SMART COMB/GREASE, PELLET, and AC IGN connections.
    
4. The SMART connection is siliconed into place to prevent strain on the cable. Follow the blue and brown wires and disconnect the connections to the Lid Light and the Auxiliary Fan.
   
5. Unscrew the plastic bottom smart combustion housing from the side of the hopper.
6. Replace the Smart Combustion Wire Harness that comes with Motherboard replacement.
7. Fasten the new bottom of the smart combustion housing assembly (with motherboards) to the side of the hopper.
8. Connect all the harnesses based on the given diagram. See Wire Harness.
9. Reattach the smart combustion cover and reattach the hopper side service panel.

How to Replace a Smart Combustion Wire Harness

1.  See Wiring Harnesses for visuals of the wiring diagram, and images of the individual harnesses.
2. Ensure grill is off and unplugged.
3. Remove the hopper side service panel using a manual impact driver to remove 6 screws (2 located on top of the access panel, 2 below the hopper side rail, and 2 on the bottom of the access panel).
   • Pro Tip: Some customers find this easier if they remove the P.A.L Rail first.
4. Remove the grease and ash keg.
5. Under the grease and ash keg opening there will be a plate held in by 2 screws. Remove this plate to expose the smart combustion wire. Cut the zip tie to release the Wire.
6. Remove the Flame Assembly (located in the grill cabinet). Removal instructions are ion the first 20 seconds of video in this step.
   1. Tape off the Flame Sensor to the motherboard wire to use it as a guide and before you pull it through.
7. Gently pull the Flame Sensor wire towards the motherboard
8. Locate the Original smart combustion wire located within the hopper assembly. Ensure the Lid Sensor has been disconnected (Minutes 0:00-1:03 in video), and the motherboard connection has been disconnected.                                   
9. Disconnect the old Smart Combustion Wire (this wire is green, black, red,
   and yellow).
10. Plug in the new Smart Combustion Wire
11. Pull the new flame sensor connection towards the flame assembly.
12. Plug in both the remaining lid sensor and motherboard wires.
13. Plug grill back up, turn on power.
14. Run a Self-Test & Diagnostic Test.