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What to do if your WiFIRE-enabled grill's controller displays a negative temperature or shows the temperature going down as the grill is heating up.


  1. The grill's temp shows negative.
  2. As the grill preheats, the temperature on the controller display goes down instead of up, even though the grill's actual temperature is going up.


Typically, the thermocouple wires are installed backward.


  1. Power off and unplug your grill.
  2. Access the thermocouple's connection point.
    • Timberlines: Remove the hopper access panel and the Smart Combustion Cover.
    • D2 Grills: Unscrew the controller.
  3. Find the yellow thermocouple connector.
  4. Verify that the + and - signs match the + and - on the motherboard or controller.temp_backward-thermocouple_match.png Thermocouple_%2B_-.png
    1. If incorrect, disconnect and connect correctly. If the grill still reads temperature backward, continue to the next step.
    2. Turn on the grill and ignite to verify the temperature goes up correctly.
      1. If it still goes down, continue to the next step.
  5. Swap the thermocouple wires.
    1. Unscrew the two Phillips-head screws that secure the wires to the connector.
    2. Switch the wire placement so the wire that was connected to the + is now connected to the -, and vice versa.
  6. Turn on the grill and ignite and confirm the temperature goes up.

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