Normally this is caused by a thermostat that is stuck in the open position. Replace the thermostat. If you are only referring to the heater reaching the correct temperature it can be a bad thermostat or the heater core can be clogged . You can try back-flushing it to remove any clog but may end up having to replace the core which is always a time consuming job.
yeah. It happens
It stops your car from freezing and not starting up in cold weather
If you back up and hit the brakes and the car stops running, this is likely to mean that the car is not working properly. It is most likely to mean that the fuses are going out.
yes
IF YOUR CAR IS HEATING UP(OVERHEATING) AND YOU STILL DRIVING IT, A FAULTY THERMOSTAT IS THE LEAST OF YOUR PROBLEM.
passive solar heating
If the microwave stops heating or the turntable stops working, then you need a new one.
It reduces friction between surfaces - and stops components from heating up too quickly.
A street car makes frequent stops.
What stops a car from moving forward or backward
It is either low on coolant or your thermostat is sticking open.
you may have a stopped up fuel filter. or the idle needs readjusting