You should notice some rise in temp because there is no air flowing through the radiator, or at least not as much as there would be if you were driving. A vehicle with a mechanical fan will notice it less than one with a thermostatically controlled electric fan.
However if the temperature rises above the set point of the thermostat then there may be a problem with the fan operation.
In summer weather, it is good to let the vehicle idle for a minute, or so, until the oil is flowing good. In the wintertime, or temperatures below about 50 degrees, it would be good to let the engine idle for about five minutes before heading out.
If you drive the car 10 miles, and it doesn't move.
Thermostat stuck open or no stat at all. Faulty temp sensor or Gauge.
I bet the whole car will explode. I dunno that much about cars but I bet it'll happen, so DON'T TRY IT AT HOME.
First you start the car. Then you let it idle or drive it until it reaches operating temp. Finally you turn the heater on to the defrost setting.
yes just make sure antifreeze level is topped off and you will make it just watch temp gauge.
1995 MonteCarlo i have heat when car is idle but when you put in gear and you give it gas has no heat any thoughts i have already had the head gaskets replaced and the heater core flushed but still no heat
Commonly check the temp gauge on the dash.
Probably a defect in the gauge cluster. This old a car, you can pick up a gauge cluster cheap at a junkyard.
1min or 2 i like to wait till the temp gauge starts to move or let it get to normal temp.
Stuck open - no heat from heater, temp gauge hardly moves off of cold. Stuck closed - overheats engine, temp gauge quickly climbs to hot.