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?

 

Either a stuck blend door or the blend door actuator is bad.

 

Does the dash temp gauge get up to normal operating temp?

 

Yea it does..gets uptown 210 and its Luke warm at best.

 

Where are the blend doors located?

 

Usually they are under the dash. I am not familiar with the 93 Blazer.

 

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