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93 cavalier heater runs cold after awhile. The car will heat up but will quit blowing hot air and start blowing cooler air after about 15 mins. Any ideas why it would quit blowing hot air?
Wiki User
∙ 14y ago
First of all, if you've had any work done to the cooling system lately, or for some reason it has gotten extremely low and you've had to add a lot, you may just need to "bleed" the cooling system. There could be air pockets built up. Turn the heat lever to the hottest position, remove the radiator cap and let the car run to normal operating temperature. Let it cool completely down and top off the coolant. If this isn't the problem it's possible that there is blockage in the system somewhere. It could be the heater core itself or a fitting. My 92 3.1 has a heater outlet just below the thermostat housing. When I took it off while doing some other work it was so stopped up the tip of an ink pen wouldn't have fit through it. Hope that gives you a place to start.
Wiki User
∙ 14y ago
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