[riccbhard]

A common problem is to find one day when moving the climate control knob on your 98 Blazer to the cold position and tap the A/C button you get still hot air and hear a *creak* *pop* from under the dash. So now what? Well, chances are it's the blend door motor, the unit that moves a blending door in a duct behind the dash on the passenger side that moves anywhere between cold and hot, corresponding with your temperature knob.

We were able to get the one in our 98 Blazer out by dropping open the glovebox and using some small tools.

Pictures:

Picture 1, the electronic blend door motor


Picture 2, the blend door taken apart, by removing the 4 small screws


Picture 3, The Problem, the broken gear.


Why the gear breaks I am not sure. The door itself does not seem hard to move.

More to come later, such as pictures of where it is located.

Currently, the blend door itself in the Blazer is tied to the cool position so the A/C works.