1996 Chrysler LHS no heat

Yes, maybe the temp. blend door is not moving to the correct position in thr heater/ac unit. It may be electric or vacuum operated, sometimes a cable also.
It is inside behind your inst. panel.Joe

behind instrument panel, where the control of heat/ac is? how can I get to that door? .. any idea if this door is controled by some fuse/relay which can be located in the fuse panel?!?

If you check there may be a fuse out. But I think there is two types. ! has a small motor to move the blend door from hot to cold. 2. Has a cable right behind the climate control panel. The cable goes to the top of the door, either one is on the top of the heater a/c unit. A black box that holds all the doors, evaporator and heater core. The heat blows out of it on its bottom. It is quite a bit of disassembly to remove. If you take the control panel out, you may see something through that area and if it has a cable you will see that also. If you have an electronic you just set the temperature in degrees, if cable there is a slide attached to it. ok Joe The door is in the unit and is serviced with the unit out and apart. about a 6 hour job. Joe