Coagulated, Rennet, Cow, P&H - No Curd Formation, Thermometer Incorrect

[Cheese Head]

Well congrats, good news you found the problem, tough about the finding out the hard way, happy trails!

[JohnnyBHammerer]

Although I'm new to cheese I am not to temperature control.  I very much like electronic, and IR thermometers, but don't fully trust any one thermometer.  I usually take critical readings with 2 of them.  There is something comforting about having separate devices agreeing on a measurement.