Lexus SC430 :: AC Unit Causing The Car To Vibrate
Jun 18, 2014
The air-con unit has caused the car to vibrate (only way to describe it) quite badly.
It started in January (which is winter in the UK) so I switched it off and it stopped - hence my diagnosis that it was the ACU at fault.
As spring approached and the temperature started to rise, I put it back on and it appeared to work fine no vibration and plenty of cool air.
Occasionally (one or twice over many 1000's of miles) it would do it, but cycle it off/on and it went.
I figured it was probably the serpentine belt that needed replacing - which happened on the service last month, they advised it was worn so I was right to replace.
Yesterday the vibration came back with a vengeance, and my suspicion is that perhaps the belt-tensioner should also have been replaced as these have a limited life so was slipping due to the extra load of a hot day and me switching the ACU on.
A small edit after submitting - I'm assuming it HAS an automatic belt tensioner that is based on some spring mechanism - can't believe you'd have to adjust these manually?
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