try changing thermostat and a coolant flush if that doesn't work probably blown head gasket or cracked head or block.
Could be, low on coolant, a stuck open thermostat, a plugged heater core or faulty temp blend door actuator.
Car not blowing air or heat
there is no heat inside the car what is wrong ?
the heater core may be plugged up
If everything on your car ( thermostat, heater core, heat controls, water pump) has been changed and you are sure that it all works, check the water flow. A clog or an air bubble in the heat lines will cause coolant to not flow and have no heat output.
You could do a lot of damage to a car if you hot wire it wrong. You could end up burning the car down.
many things could be wrong......if you are losing antifreeze it could be a hose, water pump, a radiator leak, head gasket....check for any orange or green fuild under the hood of the car and any signs of somthing being wet.......if no fuild is lost could be the themostat...if u have no heat in the car it could be a sign of the themostat...the themostat could be stuck closed...this is if there is not major damage to the car entarnaly to the engine....
over heat could be several reason radiator chokeup, less coolant, and also could be your compression leakage through cylinder head gasket
well it could be because of the heat. if its cold out and you have the heat on in the car, then you will get hot and that will cause the window to fog.
Do you have any particular car or any particular motor in the particular car? BClear.
water damage.
You have a blown head gasket.
Could be a tire or wheel that is out of balance Could be a bad tire with internal damage Could need a new car