My Buick Park Avenue seems to have a heating problem. I am able to get heat on the drivers side and it only blows cold air on the passengers side. Also, it seems like it is only blowing cold air on top for the windshield? Any help would be appreciated.

Try unplugging the battery for 5 min's to re-sync the dual climate controls. If that fails it is likely that the air temperature control blend door is sticking to in the heated air position, this is either due to the door being warped and sticking inside the duct work or the electric actuator for the door being defective, both are usually replaced.

most likely a passenger blend door actuator or binding blend door also possible control head failure

you may have dual heat controls, one for the driver and one for the passenger . my 98 La Sabre had them.

i just bought a 98 park ave and i had the iossue of hot on passenger side and cold out the driv ers i was told i had to replace the control head and both accuators...... i did a trani flush and it fixe my problem

my a/c blows heated air out on passenger side and cold on driver side what is my solution to this problem

check under your hood they may be a loose air hose by the firewall..

Not exactly certain, but sounds like you have a broken "blend door" or acuator malfunction

I have a 99 Park Avenue and I had the same problem. The freon level was low.
Hope this helps.

Check the operation of the drivers blend door actuator. Sounds like its stuck or broken. Does the temp display on the dash flash?

sounds like the drivers temp door actuator is not working should be located on the drivers side of the air box down by the gas pedal or center dash area