Jarebear Posted February 18, 2016 Share Posted February 18, 2016 I have a problem with my blower motor on my 98 LS400. I noticed that, intermittently, the blower motor will kick down from the speed its at to a very low speed mode. Eventually while I'm driving, it will kick back up to the speed its supposed to be at. When it kicks down, it usually only lasts a few seconds and then goes back up. Anybody have any idea what might be causing this. I've already seen some discussion on this issue, where some suggest it might be a in-car phone wiring issue. I really don't think this car had any dealer installed phone, but I'm not 100%. There are no left over components from a phone that usually accompanies an old car phone installation. Is there any chance this might be a blower motor resister issue? I replaced my blower motor a couple years ago, but not the resister. Let me know your thoughts. Quote Link to comment Share on other sites More sharing options...
jamesm182 Posted February 19, 2016 Share Posted February 19, 2016 There is a common fault with the LS400 regarding the blower motor not changing speeds - not sure if this is linked with your issue but may be worth taking a look at the following thread: http://us.lexusownersclub.com/forums/topic/52682-blower-speed-mystery-solved/ Quote Link to comment Share on other sites More sharing options...
Jarebear Posted February 19, 2016 Author Share Posted February 19, 2016 Thanks. I think on the 98-00 models, all of the relays controlling the fan speed were integrated into one (expensive) component (the resister), so I think the linked thread you suggested MAY be addressing an older model. Quote Link to comment Share on other sites More sharing options...
Jarebear Posted February 19, 2016 Author Share Posted February 19, 2016 Nevermind, there was a relay for the blower motor under the hood. I replaced it and that solved the problem :) Quote Link to comment Share on other sites More sharing options...
sha4000 Posted February 23, 2016 Share Posted February 23, 2016 Good that you got it fixed. Quote Link to comment Share on other sites More sharing options...
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