BigBuggie Posted January 31, 2008 Share Posted January 31, 2008 Something I completely forgot about so far to ask. When the HVAC blower is engaged on high it is quite loud, accompanied by a vibration, same with the medium setting only not as extreme. The low setting is silent except for an occasional ticking when the car is cold. Anyone know what this could be? Pete Quote Link to comment Share on other sites More sharing options...
Leadfoot Posted January 31, 2008 Share Posted January 31, 2008 When the HVAC blower is engaged on high it is quite loud, accompanied by a vibration, same with the medium setting only not as extreme. The low setting is silent except for an occasional ticking when the car is cold. Anyone know what this could be? Pete Yup, if its not some loose debris that has gotten in there somehow (have you got kids??) then it could be from the factory. Here is a bit from my users manual new features list; 1998 MY LS400 — NEW FEATURES - AIR CONDITIONING 1. Description The following items have been changed in the ’98 LS400. blah blah blah Flex fins have been adopted in the center vent to reduce the noise that is created by the airflow. I wonder if you are not alone in this and they rectified in later years? Quote Link to comment Share on other sites More sharing options...
BigBuggie Posted January 31, 2008 Author Share Posted January 31, 2008 Thanks for the info bud, But I mean it is loud! As in you can feel the vibs in your seat. No way it shipped from the factory like this. So Ive been running it on low and med, just so I can speak to anyone els in the vehicle in a normal tone. I wonder whats causing it, I checked for debris today, I didnt see anything, Need to find out how to get into that system. Pete Quote Link to comment Share on other sites More sharing options...
eatingupblacktop Posted January 31, 2008 Share Posted January 31, 2008 Is the a/c on or off when you get this vibration? Quote Link to comment Share on other sites More sharing options...
BigBuggie Posted February 1, 2008 Author Share Posted February 1, 2008 I get the same regardless of a/c status. Made a discovery today though. The noise is coming from the area beneath the glovebox. If I get in there and apply pressure to this area it changes the noise a bit, Almost sounds like something is in there disrupting the air flow, On low it ticks and med/high there is enough pressure to cause a vibration. Hmmm but selecting the dash vents only should stop the noise, Which it does not......? Pete Quote Link to comment Share on other sites More sharing options...
eatingupblacktop Posted February 1, 2008 Share Posted February 1, 2008 Does it change at all when you select different air flow vents and are you getting full flow? If so, then then there's no serious obstruction that would cause the vibration. My guess would be either the fan housing is not secure or the bearings are shot. Quote Link to comment Share on other sites More sharing options...
cardona6569 Posted March 1, 2008 Share Posted March 1, 2008 Hi: Make a visual inspection under the globebox and you'll probably find what its wrong. It is nothing stuck in there, outside or inside you may have a bad blower. CPR Quote Link to comment Share on other sites More sharing options...
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