Constant Heat I get constant heat in the car weather I move to cool or even air conditioning. Please advice, thank you.

I'm not sure exactly how this applies specifically in a car, but on a home heating and cooling (air conditioning) thermostat, it is often associated with the fan or blower setting.

If for a system fan:

"Auto On" setting in a heating / cooling system would start the fan when the temperature climbed above or dropped below the setting you on the thermostat and start the heat or cooling source. Once the thermometer indicates the desired temperature had been reached, the heating / cooling source would be stopped and the fan would turn off.

"On" would run the fan all the time, regardless if the thermostat tired to start the heat or cooling source. This would result in constant circulation of the air in the space(s) and tend to keep warm or cool spots (rooms) from being created.

As long as the fan _does_ come on, it is probably (highly likely) working correctly. These fans control ''overheating'' conditions. They aren't really for ''constant cooling'' like older cars.

Usually this is caused by a binding blend or mode door. The actuator keeps trying to move it and can't. Locate the exact source of the noise. Then disconnect the actuator and try opening and closing the door by hand.

Sounds like it is low on coolant. Add coolant, drive the car, let it cool down, and then repeat the problem until the coolant level stays constant in the coolant tank. If it doesn't stay constant after a few tries, there may be a coolant leak inside the engine (blown head gasket or intake gaskets).

if i were you i would change thermostat and flush your radiator..unless its your heater core

from memory the electric fan runs constant when air conditioning is turned on i would suggest the thermal control for the electric fan monted to the radiator is not functioning correctly is normally mounted to a flat spot on radiator

I assume the vent door is loose or broken,and when it is set,maybe half way on the dial,the door moves to far closed.It is either that,or the control is bad.

YOU MAY HAVE A AIR BUBBLE IN YOUR SYSTEM. NO MATTER HOW HOT THE CAR GETS IT WON'T PUSH HEAT THROUGH THE AIR BUBBLE. LOOK FOR THE HIGHEST POINT IN YOUR COOLING SYSTEM. I SUSPECT A HEATER HOSE. YOU HAVE TO GET THE AIR OUT OF IT.

The Air-conditioning needs to be re-gassed. Take the car to an Auto Mechanic to get the Air-Conditioning re-gassed. They might also need to check it for leaks to make sure the gas stays in.

Try first to fill up the radiator while squeezing the top part of the radiator hose to clear out the air.  Observe once that is done.  this may be caused by a radiator cap that is not sealing the pressure correctly or some parts the cooling system that may let heat escape like radiator hoses that are not secure.  If they all seemed to check out, you may want to have your head gasket checked.