How cold should my AC be at the vent in my car?

Why does my car make a whistling sound with the ac on?

Written by admin on February 26, 2023. Posted in A/C Performance Test, A/C system diagnosis test, Uncategorized.

A misaligned duct could cause a whistling noise.
A cracked Hvac case could cause a whistling noise.
Foreign items, such as paper or leaves, in the ducts or blower cage could cause a whistling noise.

Tags: ac whistling noise, blower motor foreign materials, blower motor noise, hvac case whistling noise