Technician needs extra help to repair faulty A/C in Town Car
Q: We are in the limousine business and drive a 2011 Lincoln Town Car. About a year ago, we started having air conditioning problems. We went to a reliable A/C shop. They started with diagnosing the problem with some elaborate and sophisticated equipment and found that the on-board computer was not communicating with the compressor. They ordered a new computer using the car’s VIN and installed it, but this didn’t fix the problem. Next, they told us that the computer in the car was for a 2011 Crown Victoria, not our 2011 Town car, but not to worry they could reprogram it, which they attempted to do, but that has now created a host of other problems. Every light on the dash is on. The A/C still doesn’t work. Any suggestions? —Lou.
A: The technician seems to be trying everything possible without total understanding of the system. The first step is to check the system for trouble fault codes and sensor values. The next step is to compare sensor values. It could be something as minor as the in-car temperature sensor being out-of-range. If you want to continue to use this shop, then have the technician call Identifix (800-745-9649) and speak with a representative before proceeding any further. Your shop tech has spent a lot of time and should get one last opportunity to repair the system. With Identifix’s help working with the technician the A/C system could be up and running in a day.
Q: I have a 1997 GMC pickup. After a complete renovation of the front suspension with a new steering box and pump, the truck continues to wander. Is it the verifiable steering? I love the truck. Can you help? —Tony
A: Start with the rear of the truck for any worn suspension bushings, shocks, and rear differential movement. Next, inspect the front suspension for all replacement parts for play. An often-overlooked adjustment on the top of the steering box requires loosening the lock nut and a flat blade screwdriver to adjust. You can also add a steering shock stabilizer that mounts to the center link and frame. Be sure the tires are the correct size and pressure.