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Heater not blowing hot air

(1990 Ford Probe)
in Sumter, SC on January 05, 2010
The heater blows out cold air instead of hot air. I've changed the thermostat. My car also overheats. What could it be?
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Popular Answer
on January 06, 2010
You may have a bad water pump, but get this looked at by a mechanic that can diagnose this and determine if any damage has been done to the engine from the overheating.
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