So about three weeks ago, I was doing a brisket and had one too many Knob Creeks and dropped my meat thermometer. Cracked the face and so I couldn't read it. Yesterday, I was running errands getting ready for my Easter cook. Stopped by the dealer and bought a BBQ Guru. Tested the probes yesterday afternoon, ready to roll. I started the egg this morning and did my usual for a slow steady cook. Rubbing alcohol in four places let it burn off closed down the vents and started to hook up the Guru. About ten minutes went by and I removed the vent slide and screen and slid the Guru in. Replaced slide set pit temp to 300, I am doing a Prime rib. Hour later pit temp 370. So I removed the Guru fan and went back to the traditional manly way of adjusting the vents. I am now an hour behind, and I have a really expensive meat thermometer. What did I do wrong. I also closed down the hole slide in the guru to 1/4 open.
I have never had trouble controlling temps for the past two years, just thought I would try something new, and the wind is sometime an issue for me, so I thought this would help.