I think my car has an issue with the air intake from the outside for the air conditioning unit.
When my air con is on recycle, its fine, works as expected
When it's set to get air from outside, it's fine for the first 30 seconds or so, then approximately every 10 seconds it makes a squeaking noise from underneath the center dash.
It only happens when the air con is set to get air from the outside, and it doesn't matter what the fan speed is, or if the engine is on or off
Any ideas?