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

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.

by in Martinsburg, WV on December 06, 2012
3 answers 2 comments
ANSWER by on December 06, 2012
Blower motor bearing worn, debris in blower wheel. Remove fan unit clean or replace.
1 person likes thisFlag inappropiate
COMMENT by on December 06, 2012
Thank you...i'll start there.
ANSWER by on December 06, 2012
blower motor bushings or fan blades are bad
COMMENT by on December 06, 2012
Thanks for taking the time to answer, i'll check it out.
ANSWER by on March 28, 2013
ac compressor

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