Haha. Well, that does change things.
So, if this is making a noise in all settings except defrost but you have to be moving then we are going to need a little different tactic.
When you are in defrost the recirc door is closed so that you are not pulling in more fresh air.
Basically, defrost is there to pull as much moisture out of the air so that it warms/cools the windshield but blows dry air on it. This means it does not want to pull in outside air that will contain higher moisture than what has already been conditioned.
This means that I would have expected the recirc closed make a difference. So, if that makes no difference then the only thing, I can think of is that door is not fully closing except in defrost.
The way to confirm this is to use a scan tool and command the door fully closed and then see if the noise goes away.
Any chance you have a tool capable of this? I don't want to tell you to guess at the recirc door actuator but without it that is what would make the most sense.
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Saturday, June 18th, 2022 AT 5:12 PM