car heating not work??

Question

PLEASE HELP??
The heating in my car does not work and only blows out cold air. when i first baught the car it was overheating and the fan did not work in the engine so the man who i baught it off put a new thermostat in and said the fan was now working..... to be honest i dont have a clue about anything like that.
but ever since the heating has been clod

does any one know what it could be?????????

Answer 1

sounds to me like that he either removed the old thermostat or put in one that is "too cold" for the engine. My suggestion is that you take your car to a reputable mechanic and explain the problems you have had, before and after the person you bought it from worked on it.

Answer 2

As most people have said, it's the A/C. The heat is very easy to make because the engine becomes very hot within a few minutes of starting the car. In fact most engines have an elaborate series of fans, radiators, and fluid filled pipes to keep the engine from overheating. So simply taking some of that heat that already exists and blowing it into the cabin is no big deal at all. The air conditioning is another story though. The A/C takes a significant amount of electric to run what is basically a small refrigeration unit. In turn more energy is taken to replace the electric that has been used, and that in turn leads to a lower fuel consumption. But at the end of the day the difference is hardly significant. Some people like to open windows, thinking they are saving on gas. But the reality is that by opening the windows they are significantly increasing the drag of the car, that costs gas. If you never switched on the fan, the A/C, the radio, or operated any electronic gadget in the car except the absolute essentials, you would save on gas. Would that saving be significant? Probably not. Would it be worth the sacrifice in comfort? Almost certainly not.

Answer 3

Make sure your coolant level is full, then make sure your heater valve which is under the hood and in-line with your heater hoses moves and has the little vacuum line hooked up to it. If you heat guage works but the air blows cold then your heater core is clogged.... also watch your heat guage...if it sits low then there is either no thermostat of needs a new one, if the guage is in the middle you should have heat, if not then it is either a clogged heater core or the heater valve is bad.

Answer 4

Check your heater hoses going to your heater core by the firewall. If one is hot and the other is cool your heater is plugged up. This does not mean the heater core needs to be replaced. It may be flushed out and you will get good heat again. This service will need to be done by a qualified shop. Reverse flushing the heater core needs to be flushed with water and air pressure. If both heater hoses are hot it may in the air distribution box which may be a cable or actuator. Unfortunately there is no easy answer, get it checked before the cold weather hits because then its tough to get into a shop. I hope this helps. www.triangleradiator.net

Answer 5

Bad heater core, bad thermostat, or if it had overheated there could be an air bubble in the system. If it overheated take it to a shop. You could even have a blown headgasket and the heater not working will be the least of your problems before long.

Answer 6

my bf just fixed mine, with the same symptom(s). he said i was low on antifreeze. to use his explanation, the engine has to push the water up through the heater core, and if it is too low, then the only time the heater works is when your RPM's are higher(like on the highway). also your car engine will run hotter, or overheat, until this is fixed.

while checking the coolant, also check to make sure your radiator cap is not leaking.

finally, check (after your car has been running a little) the top large hose coming from the radiator to see if it squishes (has pressure) (...yes, i'm a girl. i say "squishes"). if it squishes, you have a coolant pressure leak. try changing the cap first, and if that does not work, then you need to get the vehicle checked out by a mechanic for the pressure leak.

Answer 7

what kind of car is it, does it have an electric fan, it could be the thermostat or the heater core. See if the core has been bypassed on the back firewall. There will be 2 pipes sticking out of the firewall about 6 inches apart. If there are no hoses on these pipes, the heater core has been bypassed.

Answer 8

The heater core could be clogged. A radiator flush may fix the problem but may also cause other leaks(worst case scenario- but possible). Also there may be a vacuum line leak that is not allowing the mechanism to change when you manual adjust the temp.

Answer 9

Could be your head-gasgit. Sometimes where thats split or ruptured it causes a flow of cool air to leak into the heating system. Maybe the guy at the garage has ripped you off!

Answer 10

Nothing to do with the fan mate! if the car is only blowing out cold air i think the problem is your HEATER RESISTOR, your fan is a totally different component and even if it did do your blowers it would prove its workin by blowing out cold air if it was broke it would blow out hot air wouldnt it!