Heating Problems-Help!

We have a '93 Park Ave. Ultra with climate control & dual zone. The heat in any mode is only luke warm on the driver side and the passenger side blows cold air. I've read in previous posts about blender doors and actuators. How do we access these and how can we tell for sure if they are what is causing the problem? My temp display also flashes (it's done that for a long time, before the heat actually gave us problems) It has been so cold lately and driving without heat is killing me! Please help.

on the display, with the key at ON, push OFF and WARM at the same time for a a few seconds.. it should flash some code .. post them here and someone witht he codes can tell ya what is it.

to stop this diagnosis mode just push OFF a few times of shut the key off.

Deadring

on the display, with the key at ON, push OFF and WARM at the same time for a a few seconds.. it should flash some code .. post them here and someone witht he codes can tell ya what is it.

to stop this diagnosis mode just push OFF a few times of shut the key off.

Deadring

Hey-Thanks for the Tip!! Will go out to car right now to get codes & post them.