My car heater is only blowing cold air?
check your coolant level, if it is ok and your engine shows normal operating Temperature, then check your heater hoses that are going into the heater box, if one is hot and the other is cold, then you probably have a plugged heater core if they are both hot then it is probably your heater control unit that is not working, some of these are vacuum controlled some are electric, and some are a cable.
My car heater is only blowing cold air?
did you check your antifreeze. not enough will cause it to blow only coll air
Check the heater core.
Sandra has a good point also, but I would replace the thermostat. It is probably stuck open not allowing the coolant to warm up.
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It may be one of the answers to your problem. Be sure the system is full and circulating properly with a 50/50 mixture (-40F) of coolant. In a
car that old the Heater Core may require flushing so that your car will
heat properly. You should be able to get 150F + heat at your vents if
the heater if functioning as it should. Put a big blanket or sleeping bag
in the back seat just in case. Good luck!
YES !
Check heater and A/C dash controls plus the heater control valve that
shuts the hot water on and off to the heater core. Might check to make
sure thermostat is not stuck in the open position.
Make sure you car has coolant then run your car int eh driveway for 20 minutes without driving it. This will heat up your car. Turn on your heater. If it is hot then after you drive it it cools down. It's your thermostat.
If it doesn't' get hot. then i would guess it's the heater core is blocked or your system might have a valve broken.
Start by checking the fluid level. You may have to do this more than once if air pocket in heater. No problem. If the thermostat is worn and stuck it will usually show up if you have a temp. guage. There are two hoses (about 3/4%26quot; in diameter) running from engine to heater box. One should be quite warm. Try the fluid level first. More info. please
