1998 Oldsmobile Intrigue Q&A

1998 Oldsmobile Intrigue Question: Loud noise/vibration when using heater or air conditioner

When I use either the air conditioner or heater I get a very loud vibration/noise. It still heats or cools, but so loud it can be heard outside of the car. What is this? I tend not to use it except for a minute or two at a time, then turn it off. This happens EVERYtime I use either and starts within 15 seconds of turning them on. -
Answer 1
Blower motor bearing worn, debris in blower wheel. Remove fan unit clean or replace. -
Comment 1
Thank you...i'll start there. -
Answer 2
blower motor bushings or fan blades are bad -
Comment 1
Thanks for taking the time to answer, i'll check it out. -
Answer 3
ac compressor -