My Aunt has a 2003 Blazer which she noticed today while she was driving she was getting excessivly hot. I found the source when driving there is constant heat blowing out of the floor vents even when the dial is set to the off posistion. When u stop turn the vents on or A/C it is greatly reduced or stops blowing all together. It only blows pretty hard when driving fast on the Interstate but can still be felt a bit at a standstill.

What should i do from here??


Thanks.

 

Sounds like the temperature door isn't closing and is allowing outside air to flow through the heater core...

 

Is there a quick fix for this?

 

I have the same problem, went to get it checked out just a week ago by my mechanicin fact. Positive its your door not closing. I got my A/C charged and checked for leaks and all of that. I have a bad door on mine and its a 2000. The motor for it burned out. The motor is 100 bucks plus and the labor fee will be atleast a couple hundred. Its located deep in your dash and in order to reach it your whole entire dash has to come out just to replace a tiny motor the size of your palm. I told my mechanic **** it ill live without it for that cost. No easy fix there

 

Actually, you can do this all through the glove department. Your mechanic either likes your money, or doesnt know what he is talking about. I did it tonight on my parts truck and it took literally 30 minutes, I garentee I could do the whole process again in 5-10 minutes after figuring it all out. All you have to do is pull off the glove box, remove the hose and swivel the vac unit to the drivers side, use a 7/32 socket and turn it with your hands to pull off the two screws in the actuator unit, lift it upwards, and you are done. Installation is the opposite. My only complaint is you have very little room to work in there, and if you have big hands, you will be all nicked up from the rough plastic pieces everywhere[:@][:@][:@]. If you are mechanically inclined, go pull one from a junkyard yourself, otherwize, pay someone else to do it for you, it cant be that expensive.