I have something inside my duct work that is vibrating and howling in the wind when I kick the AC on high. At first I thought it was my ac/heat blower motor going south so I changed it out for a new one. I should have known that was not it as the noise stayed constant not depending on speed of the motor, just louder or quieter with more or less air mass moving through the ducts. It does it on MAX, NORM and BI-Level. It does come and go but when I hit the breaks it really comes to life. If I put my hand on the underside of the dash when it's howling the duct work is vibrating like crazy. It's a whine type harmonic vibration not a deep rumble kind of one.
Anyone been inside the AC duct work to see if there is something that could be flapping in the wind at a high resonating speed to create the whining howl?
Thanks in advance. ==== DT
Anyone been inside the AC duct work to see if there is something that could be flapping in the wind at a high resonating speed to create the whining howl?
Thanks in advance. ==== DT