1. #1
    Join Date
    Jun 2020
    Location
    Florida Gulf Coast
    Posts
    27

    climate control fan only works on high

    Hey All,
    I searched for this subject but could not find it in this forum. Sorry if it's been covered before.
    The ac/heater fan in my 2005 Wrangler only works on the highest setting. I'm guessing it is a relay or a fuse. How do I go about troubleshooting it?...I'm a newbie.
    Please and thank you.

  2. #2
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,408

    climate control fan only works on high

    Its a resistor. Easy to access and change behind the glovebox




    2005 JEEP WRANGLER 4.0L L6 Blower Motor Control Module / Resistor | RockAuto

    Never look down on anyone unless you are helping them up - Jesse Jackson
    Last edited by JPNinPA; 06-29-2020 at 10:15 PM.
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  3. #3

    Re: climate control fan only works on high

    Hopefully that will fix it for you.
    I used to have an XJ and the fan got where it would only work on high and then it got where it was slow to turn on. I lived with it for about a year and then replaced the fan motor to fix it.

  4. #4
    Join Date
    Jun 2020
    Location
    Florida Gulf Coast
    Posts
    27

    Re: climate control fan only works on high

    Thanks JPN for the video link. I'm going to try to do it myself, and I'll share the results here.

    Quote Originally Posted by JPNinPA View Post
    Its a resistor. Easy to access and change behind the glovebox





    2005 JEEP WRANGLER 4.0L L6 Blower Motor Control Module / Resistor | RockAuto

    Never look down on anyone unless you are helping them up - Jesse Jackson

  5. #5
    Join Date
    Jun 2020
    Location
    Florida Gulf Coast
    Posts
    27

    Re: climate control fan only works on high

    Thanks for the input Mark Sr. I will keep the fan motor possibility in mind if the resistor pack replacement doesn't work.

    Quote Originally Posted by mark sr View Post
    Hopefully that will fix it for you.
    I used to have an XJ and the fan got where it would only work on high and then it got where it was slow to turn on. I lived with it for about a year and then replaced the fan motor to fix it.

  6. #6
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,408

    climate control fan only works on high

    Quote Originally Posted by JOBO View Post
    Thanks JPN for the video link. I'm going to try to do it myself, and I'll share the results here.
    No problem. Im sure you could do this.
    Working in and under the dash is a pain sometimes but this one is straight forward.

    Personally i think the resistors fail for 2 reasons. One is leaving the fan on lower settings when the engine is started. The onrush of current from the fan starting is too high fir the resistor for repeated occurrences. Second is electro-migration. If you look the resistor is made of different widths and lengths of serpentine copper traces. This by physics gives different resistances resulting in different fan Speeds. Its the serpentine that is the time-bomb. Ill bet most if not all traces are blown at a corner of the trace and not along a straight run.

    Anyway:
    Inspect the connector for signs of overheating or melting. Jeeps yj, tj, wj,...from this era are noted for having an issue. If you see it, there are other things happening besides the resistor.


    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

Similar Threads

  1. Climate Control not working
    By Twdg94 in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 1
    Last Post: 02-18-2020, 03:02 PM
  2. Climate control panel doesn't work
    By Adam Velazquez Jr. in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 3
    Last Post: 01-22-2016, 06:23 AM
  3. climate control knob?
    By RudeDog in forum Wrangler and CJ
    Replies: 5
    Last Post: 09-04-2013, 03:49 PM
  4. Grand Cherokee Dual Climate Control Trouble
    By PlasticNerd in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 3
    Last Post: 02-01-2011, 11:33 PM
  5. Rotary climate control in 98 TJ
    By civicsiebp in forum Wrangler and CJ
    Replies: 1
    Last Post: 05-17-2009, 03:18 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in