my car is overheating and my heater won't work. what is it?
Dec 10, 2008 at 8:27 PM
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MMPRINCE4000
CAR REPAIR CONTRIBUTOR
8,548 POSTS
Most likely a bad thermostat, but closely inspect for any leaks, all hoses, heaterhose connections and waterpump weep hole.
Another posibility is the waterpump. If the hose from the thermostat is cool when engine is hot, then most likely a thermostat, if hot then I would suspect the waterpump.
Dec 12, 2008 at 8:13 AM
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