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.
Loud noise/vibration when using heater or air conditioner on 1998 Oldsmobile Intrigue
Blower motor bearing worn, debris in blower wheel. Remove fan unit clean or replace.
Thank you...i'll start there.
2 more answers , 1 more comment
blower motor bushings or fan blades are bad
Thanks for taking the time to answer, i'll check it out.