I own a 2010 Cadillac SRX Premium, 3.0L AWD. I'm getting an intermittent whistling sound from the HVAC system when the heat or A/C is turned on. It's related to air flow, because the pitch and intensity of the whistling varies with changes in the fan speed. It's most prominent when set to "Auto". When heard, the sound is constant. However, the problem itself is intermittent. I've tried opening and closing the recirculating vent, changing the temp and switching from "Auto" to "Manual". None of these affect the whistling. I've checked all of the vents (including the one in the glove box). I opened and closed them all. It makes no difference what position they are in. This would seem to indicate that the problem lies in the ductwork, as opposed to the vents themselves. The sound is emanating from somewhere "inside" the system. Thank You
have the same problem?
Wednesday, January 26th, 2011 AT 5:34 AM