Paul Sherman Posted May 19, 2005 Share Posted May 19, 2005 Hi all: My heater fan in my LS400 ('93, 179K miles) has been behaving erratically for a month or so. I returned from a business trip yesterday and it's no longer erratic - it doesn't spin. Not good news as the weather gets hot. Has anyone tackled one before? (searched the messages, didn't find anything, but could have searched wrong...) Any info related would be greatly appreciated; wiring diagrams, how to get to the fan, possible failed relays, etc. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
wwest Posted May 19, 2005 Share Posted May 19, 2005 179k miles.... Intermittent blower failures followed by complete failure. Commutator brushes have worn out in the DC blower motor. Quote Link to comment Share on other sites More sharing options...
larryp Posted May 19, 2005 Share Posted May 19, 2005 You can remove the blower motor without removing the entire blower/evaporator unit which should save some time. :) Removing the whole unit is a pain. You'll have to remove the panels on the passenger side and unplug some wiring harnesses to gain access but there are screws on the bottom of the unit that will allow you to drop the motor out of the unit. Quote Link to comment Share on other sites More sharing options...
Paul Sherman Posted May 20, 2005 Author Share Posted May 20, 2005 Cool - thanks for the hints. It may be a loose connection - I was driving last night, hit a small bump and it was suddenly working fine. Still working this morning, too. (Thinking back, it may have started working after hitting little bumps on the other occaisions...) Knowing how to get to it will make troubleshooting a LOT easier! B) Will keep you all posted. Quote Link to comment Share on other sites More sharing options...
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