1. Unplug the grill. 
  2. Gain access to the back of the controller 
  3. Unplug the two white braided wires (with red female tips) from the back of the controller.
  4. Remove screws from RTD probe.
  5. Pull out RTD probe and wires.
  6. Thread new RTD wires through the side of barrel and connect to controller.
  7. Secure new RTD probe by tightening screws.
  8. Replace access panel underneath controller.