2002 Jeep Grand Cherokee Laredo Heat/AC fan not working.

300

Asked by Oct 22, 2011 at 11:22 PM about the 2002 Jeep Grand Cherokee Laredo

Question type: Maintenance & Repair

My 2002 Grand Cherokee Heater/AC fan has stopped working. I turn the knob but get nothing. Also my light for on my AC button has stopped lighting up. The doors open and close normally. It was working yesterday and today nothing. Any ideas of what this may be?

Thanks in advance for the advice.

19 Answers

95

Sounds like a relay or fuse

7 out of 7 people think this is helpful.
2,925

First check fuses, then relays, next would be using a multimeter to check specific tolerances (voltage, ohms) that should be at the plug wires. Or apply a 12v source directly to the fan wire to see if it comes on.

2 out of 2 people think this is helpful.
300

The fuses are fine. Where are the relays? Is that the resistor? Thanks again!

6 out of 6 people think this is helpful.
300

Ok Guys, I changed the resistor and still nothing. Tomorrow I'll change out the blower motor itself and hope thats it. Any other things it might be? Mike

4 out of 4 people think this is helpful.
2,925

Fan relay is behind the passenger side head light http://www.2carpros.com/forum/automotive_pictures/188069_02grncherokeeradfanrelay_1.jpg?iact=hc&vpx=1041&vpy=147&dur=4062&hovh=210&hovw=240&tx=147&ty=126&sig=114094867369197356122&ei=oNWsTqjgFMrSiALCytXtCg&page=1&tbnh=145&tbnw=165&start=0&ndsp=19&ved=1t:429,r:5,s:0

4 out of 4 people think this is helpful.
2,925

If you want to test the fan motor just unplug it and run two wires from the battery + & - terminals directly to the positive and ground wires of the plug

2 out of 2 people think this is helpful.
2,925

I may be thinking about your fan on the radiator and not the fan motor behind the vents under your dash or center console. From my experience with Mercedes is that the fan motor is controlled through a regulator or rectifier that is a integrated circuit with a heat shield or fins on it to help keep it cooler. These are common to wear out because heat and electronics are not good together. I did a quick search and here's a site on climate controls for your model Cherokee http://www.wjjeeps.com/climate.htm

3 out of 3 people think this is helpful.
300

Hey Matt Thanks for the replys. I took the blower motor out and hot wired it and it was fine. I have no power going to the plug on either the resistor or the blower motor. I do have power to the fuse. I'm leaning towards the switch behind the knob itself. Does this sound feasible or should I be looking elsewhere? Again I appreciate the help. It's cold here in the Northeast of PA.

2 out of 2 people think this is helpful.
2,925

Sounds like the controls are worth checking out. Was anything spilled on the dash in the past? I assume if it was purchased used you'd have no idea. Maybe spray some electronics cleaner in there. That might do the trick.

1 out of 1 people think this is helpful.
300

I'll check them out tomorrow. I bought it brand new so I know nothings been spilled in there. Does the face plate on the control panel just pop off?

1 out of 1 people think this is helpful.
2,925

I doubt that. You may have to remove some trim panels to get access then some screws. Usually the trim pieces are held on by screws you can't see or facing downward and or are near the ash tray. If you have access to a wrecking yard, like I do, I usually go there and practice on similar cars instead of breaking stuff on mine. lol ;) Or just search Jeep forums.

1 out of 1 people think this is helpful.
300

Hey Matt, well I finally figured it out. Before I headed into tearing the dash apart I followed the fuse diagram you sent me the link to. Turns out it was fuse #20 which controls the turn signals and heat/ac as well. This is not listed in my Jeep owners manual. I replaced the blown fuse and viola! everything working again. Thanks again for the help and the links! Very appreciated!!!!!

12 out of 12 people think this is helpful.
2,925

That's good to hear. Next time you'll know to double check the fuses. Good luck

300

Now I know. Thanks again!

1 out of 1 people think this is helpful.
35

Hi, I'm having the same problem with my 2002 Jeep GCL. I'm reading your thread and am wondering that if it was fuse#20 which you said controls the turn signals and heat/ac then wouldnt your turn signals not work either? I'm going to check my fuses this eve and hope that fixes the issue.

3 out of 3 people think this is helpful.
10

my airconditioner went it was the relay switch and fan on my Cherokee 2002

1 out of 1 people think this is helpful.
120

I have a 2006 jeep grand Cherokee the ac and heat has stopped working it won't blow out nothing had someone check it out today and everything checked out fine due you no what it could be

12 out of 12 people think this is helpful.
10

I have 2001 Jeep GCL, the ac went out yesterday. The heat also is not working. What could this be?

1 out of 1 people think this is helpful.

It could be the resistor or the plug between the blower motor and it's power supply. Look at the wiring under the dash at the passenger's feet. It might be melted

Your Answer

Add photo

Related Questions

  • My 2002 jeep cherokee 2 answers

    My Jeep cherokee has started over heating someone told me the fan motor went I know nothing about cars I just drive them , so my question is how much is a fan motor or could it be something else my...

    2002 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • 2005 jeep grand cherokee "Laredo" 3 answers

    My jeep will only blow cold air. The fan only works on high. My compressor blew a few months ago and now my heat is non existing. Any suggestions???

    2005 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • 2000 Jeep Grand Cherokee overheating 1 answer

    I have a 2000 Jeep grand Cherokee 4.0 that is overheating. Thermostat seems to be working but the fan is not. What can cause it to overheat do I need to replace the electric fan?

    2000 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • hike is temperature while AC is ON. 4 answers

    Greeting, I have recently purchase Grand Cherokee Laredo V6, and recently replacement engine with a used engine. My engine got overheated because not coolant and i being ignorant of that fact. Anyh...

    2002 Jeep Grand Cherokee Laredo

    -

    Maintenance & Repair

  • Jeep Grand Cherokee Laredo (mercedes engine) 7 answers

    Hi all. I really do not know much...I hope it make sense. Does anyone know anything about Jeep Grand Cherokee Laredo "having a mercedes engine"? If it does, is it the only Grand Cherokee with it? ...

    Jeep Grand Cherokee

    -

    General

Grand Cherokee

Looking for a Used Grand Cherokee in your area?

CarGurus has 73,106 nationwide Grand Cherokee listings starting at $950.

ZIP:

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 inuevafreak
inuevafreak
Reputation 2,030
#2 Tom Demyan
Tom Demyan
Reputation 1,810
#3 thejeepdoctor
thejeepdoctor
Reputation 1,730
View All

Related Models For Sale

Used Jeep Cherokee
430 Great Deals out of 60,087 listings starting at $2,500
Used Jeep Wrangler
272 Great Deals out of 18,506 listings starting at $2,995
Used Ford Explorer
801 Great Deals out of 74,717 listings starting at $750
Used Toyota 4Runner
256 Great Deals out of 20,379 listings starting at $1,995
Used Dodge Durango
246 Great Deals out of 22,800 listings starting at $1,500
Used Chevrolet Tahoe
563 Great Deals out of 27,154 listings starting at $999
Used Ford F-150
2,214 Great Deals out of 208,693 listings starting at $1,499
Used Chevrolet Silverado 1500
1,732 Great Deals out of 167,272 listings starting at $1,800
Used BMW X5
426 Great Deals out of 16,438 listings starting at $2,000
Used Ford Mustang
363 Great Deals out of 46,832 listings starting at $1,999
Used Chevrolet Camaro
154 Great Deals out of 32,676 listings starting at $1,995
Used Jeep Liberty
237 Great Deals out of 7,249 listings starting at $990

Used Cars For Sale

2017 Jeep Grand Cherokee Laredo For Sale
3,100 listings starting at $23,800
2016 Jeep Grand Cherokee Laredo For Sale
350 listings starting at $19,991
2015 Jeep Grand Cherokee Laredo For Sale
6 Great Deals out of 177 listings starting at $19,890
2014 Jeep Grand Cherokee Laredo For Sale
6 Great Deals out of 195 listings starting at $14,991
2013 Jeep Grand Cherokee Laredo For Sale
4 Great Deals out of 122 listings starting at $13,499