1994 Geo Prizm heat not working

1994 GEO PRIZM
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RALPH11520
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Heater problem
1994 Geo Prizm 4 cyl Front Wheel Drive Automatic

hello,

I am having problems with my heat in my car. I replaced the thermostat and i still have no heat. It blows nothing but cold air. In the summer my AC stopped working also. at that point it blew hot air. I am hearing a wistlling noise when i put on the heater or ac . what can i do to resolve this issue. I live in the northeast and it is cold
Nov 23, 2008 at 10:56 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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