because it needs to cool down if it gets too hot
It could be a number of things, depending on what kind of car you have depends on some components that could be the cause of the problem. First thing I would check is heater hoses/heater core, if both the hoses are hot with the car warmed up and the heater on, then that eliminates blockages in the heater core/ hoses. If they are not both hot, then you may have a blockage in the hoses/core, or a faulty heater valve or controller. Another thing that may be the problem, is the blend door actuator, it controls how much hot/cold is allowed to enter the passenger compartment. That's most of the heating system for most vehicles. If you still cant figure it out, then its probably time to take it in for service.
Your heater is powered by your heater core. Your engine coolant runs through your engine gets hot, runs through the core heats the air, then back out to radiator. You probably need to replace your heater core.
It is a water heater, not a hot water heater. There would be little point in using a hot water heater. I assume that is your point.
smoke coming from a/c vent indicates that the heater core is leaking and needs to be replaced.this smoke is hot antifreeze, it will not cause a fire but it does stink and will eventually cause car to overheat
Older heater with rust build up in the bottom of the tank.
the blown head gasket would make it over heat. but it wouldn't cause the heater to blow cold, it should actually blow hot if that is wat happened
[first time answering questions] car heater works like the reverse of the normal cooling radiator - in fact the heater is like a small version of the rad that's on the frnt of the car - the hot water from the engine block goes into this small rad and the heater fan blows air thru it into the car - the hot heater rad loses heat into the car and - bingo - you get warm inside
You need to change your thermostat in the car.
The heater in your car uses waste heat generated by the engine. The hot coolant from the engine flows through the heater core causing it yo get hot. A fan then blows air over the hot heater core into the vehicle.
Insufficient amount of coolant or thermostat not opening
1 of a 100 but the 1st to check . BAD THERMOSTAT
Since they run in parallel, there's no way that a heater core will cause a radiator to get hot.
The heater core is a small radiator inside the car under the dash that hot water circulates through to heat the inside of the car.
Either a faulty thermostat or you have a low coolant level.
If it is a electric water heater, then one of the heating elements are burned out.
it could be a few things, but id check the thermostat as its probly stuck open, or your heater core could be bad but that will cause a water leak in your car and its a pain to change. or you can check your heater hoses for sludge.. because 50/50 anti freeze tends to cause that
your car gets warm............ or hot........
The engine has to be running and warmed up for the heater to produce hot air. So yes, you need gasoline to get heat from your car (unless you have an electric car).
First check the coolant level, a coolant leak would cause a heater to stop working- assuming you mean the blower is blowing but it isn't hot. A stuck thermostat will also cause you problems with your heat.
If the blower is good then the problem is coolant. Something is stopping the warm coolant from the engine from reaching the heater core inside the car. This might be thermostat, heater control valve, blocked heater hose or a blocked heater core. I would suggest letting the car warm up and checking the heater hoses (2) by hand to see where the hot water stops. If there is no hot water at all it is probably a thermostat problem.
Blocked heater core, faulty heater valve, disconnected connection to the heater valve.
Sounds to me that the thermostat is in backwards.
Leak in heater core. Replace core.