My passenger side is blowing warm air

SOURCE: Dual Temperature controls inside - 2002 lincoln ls

The problem is most likely a bad dual climate control valve. This component is located on the right side near the radiator under the hood. It will have several coolant hoses hooked to it and 2 silver cylinders protruding from it. You can clamp off the heater hoses at the heater core and see if both sides cool then and this will tell you that the valve is letting coolant thru when it shouldn't be.

This will narrow it down to either the valve or the control head inside the car,or wiring in between them. The only way to narrow it down further is if you have a scan tool that could access the climate control data. Have seen several of these valves cause this concern and have only seen one control head cause it.

SOURCE: AC/Heater control problem

In the dash there is a part called the blend door and blend door motor. This allows you to have warm air, and not just cold AC or hot heated air. This motor goes out and whatever position it "dies" in is what kind of air you get. The part is relatitively cheap but the labor cost is huge, because the dash needs to be removed for access.

Marvin

• 85242 Answers
• Posted on Mar 13, 2009

SOURCE: 1999 Lincoln Navigator Heating Problem

if the heater core is getting hot then the problem is the air temp control blend door actuator, a common problem.

SOURCE: AC not blowing cold 1996 Lincoln Town Car Presidential

i would try www.car-part.com its a nationwide junk yard inventory site theres some great deals there for domestic cars.try to replace the wire conectors at the compressor maybe the freon shorted them out.

SOURCE: how to install dec heater control valve

First- only my personal opinion,although I just read an article about all types of product insurance & warrantees.
You really don't need any type of warrantee, on any product
If it is new,it should be good for a while
It it is used,you already got a discount,don't give some of that back.

Not to be hurtful,but a car dealer, is not in the vehicle business. They are in marketing and sales. The vehicles are the financial instuments they peddle.
If you really read your warrantee and asked the correct questions,they would politely escort you out the door. I"ve been there.

I own the same 2004LS V8 and have all the service manuals

You would need to know the correct name of the part and a call to the dealer parts dept, they would get you the price. I could do that for you,if I knew what was really happening with the vehicle. $600..00 is a lot, but that's what they charge.

What I see is called-Dual Coolant Control Valve
It is fastened to the pass side of the radiator/fan shroud with one screw.
It has two heater hoses and one electrical connector going to it.
You will see it under the A/C drier.

Not a fun job,but you could replace yourself.