I had noise coming from my air cond. blower. But when I took it to service, it wouldn’t make any noise. I talked with the technician about finding mice in my car, I live up in the mountains. He said that was probably the problem. I paid the service fee for him to check it out. Sure enough dead mouse. He said it appears there had been more, lots of mouse dropping. So he cleaned EVERYTHING up, then they washed the engine and my car! Best money every spent. Now I will keep traps in my car when parked on my Ranch!