If the temperature on the controller is getting lower during startup, or even reading negative, this can indicate that the thermocouple is wired backward.

  1. Remove the controller and look at the thermocouple connection.
  2. On the connection, there will be a "+" and a "-" symbol. Make sure that the thermocouple is inserted correctly. (the + next to the +, see image below).
  3. If it is inserted correctly and still reading incorrectly, please contact Customer Service.
Thermocouple_wiring