Question about 2008 Jeep Patriot

1 Answer

Jeep Wrangler Heater Fan

98 Sahara. The fan stopped 100% and the sporadically starts and runs fro a while and then stops again.

Posted by on

  • yadayada
    yadayada May 11, 2010

    Jumper 12 volts to the fan motor connector and see if it runs, let me know.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Jeep Master
  • 6,982 Answers

First, check for power (12v) at the fan plug. If you have power, the fan motor is shot. (replace it).You can "hotwire"the blower right to the battery to verify motor failure... don't forget the motor housing needs to be properly grounded or power is useless!!
If no power, check the blower motor resistors (located on the firewall side of the heater box... usually looks like an oval flat plate with three or four wires connected to it. When removed, you will see two or three small coils: they should not be broken. Upstream from that you may need to look at the blower relay. Generally by the time you get to that, you have already solved the problem. If not, get a good wiring diagram before going further!

Posted on Dec 12, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Heat temp varies on 2002 Jeep Liberty


the heater fan is dead. blower.
check the heater fan fuse for BLOWN.

Feb 14, 2014 | Jeep Liberty Cars & Trucks

1 Answer

2009 Jeep Wrangler Sahara Unlimited, overheats while driving in off-road conditions (Sand). Dealer has checked for any leaks but everythign seems fine. The 4WD Shifter liankage has been replaced twice....


Your cooling system works by getting air flow over the radiator and good circulation of coolant in the radiator as well as other areas of the motor.
The fan for your radiaror is electric, but it is designed to run at different speeds depending on conditions. First, I would verify that the fan DOES run. Sitting in the driveway with the engine at operating temperature, turn the A/C on and see if the fan speed increases right away or increases after running for 10 minutes. It should have a higher pitched sound. Look at the temperature gauge again and see if it is still at operating temperature. If the temperature continues to climb, turn the heater on full blast and watch the temperature gauge, it should drop.
No increase in fan speed means you could have a module problem or other problem related to the fan speed. In your relay box, relay "K11" is the fan relay. The relay box is in the engine compartment. The underside of the cover will identify what relays go for what. Some Jeeps used 2 relays, 1 for low speeds and the other for high fan speeds.The fan and module are replaced as a unit. The PCM (power control module is the brain for the engine management system including the controling of the fan relays. Sometimes the relays are the same and you can swap them with each other to see if there is a change. Note: If the temperature is normal when you are driving down the road, than the cooling system is normal and it is the fan.
Good luck.

Aug 09, 2011 | 2009 Jeep Wrangler

2 Answers

2001 Jeep Wrangler heater blower stopped working


Yes I would go with the switch, BUT, does it have a resistor bank? That is, how does it reduce the speed? Many systems use resistors to lower the speed. Burnt or bad connections can cause this as well.
You can test the blower motor by connecting direct power from a source like the cigarette lighter if you are handy.
Most of the time the lower speeds konk out but the high speed continues to work this is the resistor bank that goes out.

Mar 25, 2010 | 2001 Jeep Wrangler

2 Answers

I have a 1999 Jeep Wrangler and the heater fan stopped working for all the fan speeds. The fuses are fine. How do you know if it is the blower resistor or the blower motor?


If you bypass the resistor pack and connect the motor directly to the fused 12v supply then the fan should run at maximum speed. If so, it's the resistor pack that's blown: a very common fault on a huge number of makes and models.

Feb 13, 2010 | 1999 Jeep Wrangler

2 Answers

I have a 2000 jeep wrangler sahara. The heater fan switch turns the fan on only when turned to the highest position. Speed 1,2,3 do not work. Also the mode change does not work when turned all the way to...


thats is two different problems. the blower motor resistor is bad causing it not to work on the lower setting just high. now on the defrost not working could be the blend door actuator but to figure it out you will need to be diagnosed by a professional. it is a little more involved. but the blower resistor is fairly easy

let me know if you have any ore question

Dec 04, 2009 | 2000 Jeep Wrangler

1 Answer

Trying to locate where #3 cylinder is at-2000 inline 6 wrangler


from the fan end count three spark plugs and you'r there

Oct 07, 2009 | 2005 Jeep Wrangler

2 Answers

My heater is not blowing hot air


WELL YOU NEED TO CHECK THAT THE BLENDOORS ARE WORKING BUT OPEN HOOD WHEN CAR IS WORM TO RUNING TEMP FEEL THE HEATER HOSE THEY SHOULD BE HOT IF THEY ARE ITS MOST LIKELY BLENDOOR MOTOR OR BLENDOOR BROKE. HOPE THIS HELPS

Aug 18, 2009 | 1998 Jeep Wrangler

1 Answer

98 Jeep wrangler, fan/air won't cut off


Replace the blower motor resistor. You can unplug the fan till you get one. Usually located behind the glove box.

Jun 10, 2009 | 1998 Jeep Wrangler

1 Answer

Blower quit working


check fuse first, every jeep ive had had the same problem ,its the fan speed resistor,most are located on the heater core /fan housing.NAPA 25.00 PLUS SHIPPING.

Dec 13, 2008 | 2006 Jeep Wrangler

Not finding what you are looking for?
Cars & Trucks Logo

191 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

60667 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21936 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...