These replacement thermocouples are designed for Yoder Smokers YS640 and YS480 Pellet Grills built on or after 1/27/15. The Type J thermocouple is used for legacy and S-series grills built prior to Summer 2022. Please use the steps below or the steps found at this link to determine whether you need a Type J or PT-1000 thermocouple for your particular S-series grill.

These thermocouples are not compatible with YS1500 model grills. 

There are two probe types used in S-Series pellet grills, the type of probe must be verified as they are not interchangeable. To verify the type of probe that your pellet grill was built with, please follow these steps on your YS480s or YS640s pellet grill:

1. Press the menu button at the main screen.
2. Rotate the selector knob clockwise, highlight "About" and
   press the knob. Then rotate knob clockwise again until
   you see probe under "About".
3. Note the type of probe your grill is using: it will either list "PT1000" or "Type J"

Please double-check build date and model before ordering.