1999 Lincoln Town Car Q&A
1999 Lincoln Town Car Question: Why does the air conditioner make a loud piercing noise?
Indeed a loose Air conditioner Belt can cause noise when turned on as belt slips on pulley, inspection of serpentine belt tensioner should be performed. A weak or bad Air Compressor clutch can also cause noise when engaged. Your local repair shop should perform an inspection to properly diagnose cause of noise and estimate. - Protech2989