I believe it is three speed. Any A/C 300 I have had of this era that used the vacuum switch was like that. OFF is just that, when the OFF push button is pressed in. When the max air, defrost, fresh air or heat push button.is pressed in, they come on to whatever speed the LEVER is set at Low is when the LEVER is pressed in, MED is the 1st click out and high is the last click out. Sounds like your switch is bad not letting the low speed energize the motor or the motor and/or resistor has an issue. Dave Schwandt From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of John Lau Mjdreamachines@xxxxxxxxx [Chrysler300] Sent: Wednesday, September 16, 2015 10:13 AM To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] 300 G OK Guys, Here is one for you: My mechanic just did an awesome job of repairing the AC/Heat Blower Switch that had apparently melted down somewhat. The knob on the switch indicates three fan speeds. He is telling me that he thinks that the blower may be a two-speed: OFF-Switch pushed all the way in. LOW-Switch pulled out one click. HIGH-Switch pulled out two clicks. So my question is: Is the fan a two or three speed fan? Thanks in advance for your feedback. John [Non-text portions of this message have been removed] ------------------------------------ Posted by: "David Schwandt" <finsruskw@xxxxxxxxxxxxxxx> ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to https://groups.yahoo.com/neo/groups/all/manage/edit For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/