The tech would have rather done a new motor if it was an option. They were backed up 3 weeks before getting to it. took 2 weeks to get done.
A big prime rib will continue to cook after you take it out of the oven, so for a final medium-rare temperature of 130 F you need to take it when it reads 120 F on your instant-read thermometer. Note that the U.S. Department of Agriculture recommends all beef cuts be cooked to an internal temperature of 145 F.
Choose the amount of time and temperature at which you want to cook the ribs. You have several options, depending upon how low the heat in your oven goes. 1  Preheat the oven to 200 degrees Fahrenheit (93 degrees Celsius). Cook 6 to 8 hours.  Preheat the oven to 225 degrees Fahrenheit (107 degrees Celsius).