Automotive Air Condition

Question

I have a 2004 FX4 Ford 150. The A/c makes a knocking noise (like a lifter) when on and don't throw out much cool air anymore. What is the problem?

Answer 1

Sounds like the clutch on the compressor is about to seize..

Answer 2

Nobody can answer that without seeing the truck in person. It's possible the compressor is going out. I would get the truck to a reputable repair facility where you live and have it checked out by a professional. If the compressor is bad, you will need the shop to install an ac kit. Figure around a grand to 1200 dollars parts and labor.