Question about 1994 Chevrolet S-10 Blazer

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Heater blows out cold air

1994 Chevrolet S-10 2wd 4.3b liter vortec

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Sound like you need to change the thermostat it sticks closed so the hot water from the motor don't go through the heater core or the heater core is clogged .

Posted on Dec 20, 2008

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There is not enough information to answer you question effectively. Is your heater blowing cold air or is your blower motor not working? A tell-tale sign of vehicle blowing cold air is bad thermostat. Also, check your fuses under the dash first and fuse relays under the hood before proceeding with the thermostat change. A worst case scenario could be your heating/cooling controls have malfunctioned.

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