So my Mazda is also having this constant squeaking noise with heat being on. It’s driving me nuts and I want to get it to stop. Any ideas would be helpful so I can fix my car. Very annoying. The nose doesn’t change with speed of car, nor with turning the fan or heat up or down, the fan does indeed drown out some of the noise, but then I also can’t hear my music. I also cannot continue to have the fan up all the time and prefer to have my Mazda set on auto (minus the A/C) at 70*. I was hoping to find the answer to my problem with he previous person but it never got answered as her issue stopped on its own. I’m the o my owner of my Mazda since day one and it is a 2017 Mazda 6 coming up on 3 years old from when I bought it. I drive for a living so my miles are up there. Please help!