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K5 Blazer 1969-1994
While this model ended its run, it is not uncommon to see them on the road or off, years after production end.
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93 Fullsize Blazer heat issues

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Old February 19th, 2015, 4:44 PM
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Default 93 Fullsize Blazer heat issues
Howdy fellas...I'm new to the forum and looking for a little help. I have a 93 blazer. The air is blowing good and strong but the heat is Luke warm. I put a new heater core in around Oct. I just put a new thermostat in today and the radiator was put in about a year ago. Anybody know why the heat isn't getting warm? Is there a sensor I'm missing?
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Old February 20th, 2015, 3:50 AM
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Either a stuck blend door or the blend door actuator is bad.
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Old February 22nd, 2015, 3:56 PM
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Does the dash temp gauge get up to normal operating temp?
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Old February 23rd, 2015, 6:42 PM
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Originally Posted by Rednucleus
Does the dash temp gauge get up to normal operating temp?
Yea it does..gets uptown 210 and its Luke warm at best.
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Old February 23rd, 2015, 6:43 PM
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Originally Posted by oldchevy
Either a stuck blend door or the blend door actuator is bad.
Where are the blend doors located?
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Old February 24th, 2015, 10:55 AM
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Usually they are under the dash. I am not familiar with the 93 Blazer.
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Old February 24th, 2015, 8:33 PM
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One blend door motor is just to the right above the gas pedal, the other is above the passengers right foot. That right side blend door motor is a bear to get to though
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