Answer by Englishangel. Confidence votes 12.5K. This is the sort of question you should ask the person who examines you. Medical professionals use a lot of lingo that the lay person doesn't understand and the doctor or midwife doesn't think twice about it so ask if you don't understand. a long cervix is quite normal.
The fan or fans should run when the coolant temperature in the radiator is above the temperature of the thermostat for your vehicle. Probably around 190 degrees. The answer should be in your operators manual as to what temperature a fan or fans should come on. Sometimes just one fan will operate if the water temperature dictates.
The air coming out your vent should be about 16 to 20 degrees cooler than the air being sucked into your unit through the return. I usually set the unit to where it blows out at about 55 to 60 degrees. Any cooler than this means the fan is not blowing fast enough and any warmer, the fan is blowing too fast.