I’ve noticed lately that I have a vibration from what seems like the air conditioner. The vibration is really only felt when parked with the A/C on. It is best described as the same feeling/sound you get when a large truck passes you and causes a sound/vibration in your car. I believe I can hear a fan/pump running (not the one in the car pushing the air) under the car. When the fan/pump starts or stops, that’s when the vibration/sound occurs. I don’t recall this before, but I haven’t used the A/C much until now. Anyone come across this. ?