HEATER FAN ON ALL THE TIME!!! HELP PLEASE

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HEATER FAN ON ALL THE TIME!!! HELP PLEASE - 5/15/2007 9:38:06 PM    studentmechanic   Posts: 4 Joined: 5/11/2007 Status: offline Hi everyone, I have a 1997 intrepid es, the blower motor always stays on high no matter what speed you turn it to or even if you turn the heater off! I have read alot on the blower motor resistors being bad but when they are bad than you can at least shut the fan off. You can adjust the positions of the heater doors and when you shut it off you can hear all of the doors close but the motor stays on high. If anyone can help that would be great, thanks alot, Matt. Post #: 1

RE: HEATER FAN ON ALL THE TIME!!! HELP PLEASE - 5/16/2007 12:18:50 AM    kurts2   Posts: 591 Joined: 10/27/2006 Status: offline Do you have the Auto temp control system?(ATC)  If so, start engine and leave in park, set to 75 deg, perss and hold the floor, mix and def buttons (top three buttons, less the AC) all at the same time. The dispaly will blink (then release).  After a bit, if it has a fault, it will display a 2 digit code (other than the 75 you set prior).  Let me know. pg24-8 (in reply to studentmechanic) Post #: 2

RE: HEATER FAN ON ALL THE TIME!!! HELP PLEASE - 5/16/2007 10:09:44 AM    studentmechanic   Posts: 4 Joined: 5/11/2007 Status: offline I just checked for codes and it was just my luck that no codes are in their. The only number ever on the screen was 75. Any other ideas???? thanks, Matt. (in reply to kurts2) Post #: 3

RE: HEATER FAN ON ALL THE TIME!!! HELP PLEASE - 5/18/2007 1:03:31 PM    kurts2   Posts: 591 Joined: 10/27/2006 Status: offline Best guess, bad control head.  The odds that there is a short to power are less than an eletronic failure.  I have seen them on e-bay for about 50$ in the past.  If you are any good with a multi meter and have a schematic, you could trouble shoot it better.  Can you do this?  If not, I'd try the head. (in reply to studentmechanic) Post #: 4

RE: HEATER FAN ON ALL THE TIME!!! HELP PLEASE - 5/18/2007 2:02:12 PM    studentmechanic   Posts: 4 Joined: 5/11/2007 Status: offline By the head are you talking about the actual heater display control panel? If that is it than I have already tried replacing that and it did the same thing. I guess I will have to try to find a schematic somewhere and begin testing everything. If anyone can think of anything elese just let me know, thanks, Matt. (in reply to kurts2) Post #: 5

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