I am using your MCP9600 breakout PCB (SKU PR35-12) and currently seeing room temperature readback despite probe temperature. This is consistent with a short circuit in the thermocouple connection. My probe tests perfectly with other sensors.
It seems like there is an extra copper strap soldered to my PCB that shorts the sensor? I can verify with my meter—probe connection reads short circuit even with my probe unplugged. This strap isn’t present in the pictures on your website. Please see attached photograph.
Shall I cut off this extra strap? It’s hard to believe this is manufacturer error, but that’s my best idea right now…