I found my Bullseye ran hot. I would set it to a temp, the actual indicated by the controller was showing it had hit the set temp, but a separate grill thermometer was showing 75 degrees higher. I calibrated it by setting the offset to 18 on the controller and this brought the temp down to...
I had the same issue on my new Bullseye. Set temp and grill temp via the controller and the grill heated up to temp on the display (set = actual). Separately, put a Thermoworks Smoke grill probe (calibration confirmed with ice water and boiling water) just above the Rec Tec grill temp probe...