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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In my 1994 1500 Chevy pickup the heater blower will not work. Need to troubleshoot.


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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