Just bought Lincoln LS 2000 Problem: with AC on

Your mode actuator on driver's side is bad. Most call it a blendor motor

Sound like you have a blend door actuator that had stopped working. You have cold AC on the drivers side but not the passenger side? Your car has dual zone climate control where you can adjust either side independently. If you have cold air when you ask for it and hot air when you ask for it then the overall system is working properly, it is just that one side is not moving the blend door between the heater core and the evaporator core. Either you have something inside of the hater box that is keeping the door from moving or that hte motor that is suppose to move the door has quit.

that car has a intake manifold leak you have to check your car in the morning look in the plastic fill reservoir and it should be you to the cold line that is the line on top the hot line is the lower one make sure it is up to the cold ligne stick something in there if you can not see it

damper doors stuck ..not redirecting heat where it should be going..located inside the duct work..

On the central console is the A/C module. Inside A/C module are driver's side & passenger's side air flaps for mixing hot & cold air and directed air flows towards driver's side & passenger's side according to driver commands. The passenger's side flap for mixing hot & cold air according to driver commands is bad. Flaps are actuated by electrical step by step motors. Could be damaged the flap actuator (motor), the flap mechanism (blocked in "HOT" air position), and / or electrical supply wires. You must access the passenger's side flap for mixing hot & cold air, and see what happens when you command cold air to the driver's side: flap mechanism, flap actuator, supply wires, ... Repair & replace bad pieces and test the A/C system.

either your R134a is leaked out ore you need add and also add a dye see if leaks.
Add to the low side the car while running with gage with ac cranked on high follow metter dont over fill it loc the ac up. Easy 20 minute job wallmart sells the gage and R134s and so do auto zones

if u will go to a intire different tech,and watch him if he will let you,,, have put gauges on the ac and add freon ,this is most likeley the problem

If your LS is blowing hot air on one side of the dash and cold on the other the problem most likely is the Dual Coolant Control Valve. The DCCV is used to control cabin temperature. This valve is mounted down low on the passenger side of the radiator fan shroud, and has 3 coolant hoses connected to it. This valve if found to be faulty will need to be replaced to correct the condition.

What have done at the dealer before and works you should have bills should be an explanation.

could be 2 things --- first check coolant level --- if coolant is low or got an air pocket in it it will make climate control act goofy ---- either hot or cold air ( in your case both ///// if coolant level is correct and nobody had messed with it it is the AC mixing valve ( located on passenger side of radiator ( V^ will have 3 lines and V8 has 5 --- There are 2 solenoids on top and this is what controls mixture of hot water to ac to control climate control .