why does a 1989 chevrolet caprice keep blowing steam out the defrost?

  • Thread starter Thread starter biblackbear
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biblackbear

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i already put a brand new thermostat in and now when you turn on the heat it just blows out steam,please help me.Rich.
 
Putting a new thermostat should not make any difference, your problem is a leak in your heater core or hose. More than likely you are also losing some coolant.
 
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