Radiator Fan Not Working - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 07-06-2012, 04:01 PM
Member
 
Join Date: Jan 2012
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1794
JeepWK07 is on a distinguished road
Radiator Fan Not Working

So I left the car wash this morning an noticed my temperature gauge was rising higher than it normally does. I pulled into the nearest parking lot and lifted the hood. I noticed that the engine seemed really hot (temperature gauge got to about 3/4). Then I realized the radiator fan was not even going. So I tried to spin it and it went free so it is not seized. I have been reading and people said to try a new relay. There are two relays, hi and low, and of course my local parts store only had 1. So I picked it up and tried it an still nothing, I turned the AC on thinking that should kick it on but it didn't. I tried the other relay and still nothing. The fuse looks alright in spot 23 so I am very confused. Should the fan only kick on at a certain temperature or when you turn the AC on should it come on? Am I missing something easy or should I be looking at something different? Do the relays normally go in a pair? If one is shot will the fan work at all?

By the way this is an 07 Jeep Cherokee WK 3.7

Any help would be great! Thanks

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 07-07-2012, 01:58 PM
Madanio24's Avatar
Senior Member
My Jeep: 2005 3.7L WK
 
Join Date: Jan 2012
Location: Eastern Shore MD/NJ/NY
Posts: 2,010
Thanks: 39
Thanked 35 Times in 34 Posts
Rep Power: 12185
Madanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond repute
Garage
Send a message via Skype™ to Madanio24
Re: Radiator Fan Not Working

The AC is connected to the ac compressor. DIfferent fan. If the fuse looks good then it is probably good. Check the fan connections. Swap a relay? The fan will turn on after the temperature reaches about half. Usually comes on when the car is standing still due to the small amount of air circulating through the radiator.
__________________
Matt
-05 WK Black
Too many mods to list...
-90 Integra GS
Reply With Quote
  #3  
Old 07-07-2012, 06:52 PM
2005JGC's Avatar
Senior Member

My Jeep: 2005 4.7L WK
 
Join Date: Nov 2010
Location: Portland, OR
Posts: 2,751
Thanks: 51
Thanked 70 Times in 59 Posts
Rep Power: 1653778
2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute
Re: Radiator Fan Not Working

No the AC will turn the radiator fan on to pull air across the condensor.

Your going to need to check for power at the fan, the fan can still be failed and spin just fine by hand, considering you dont have high or low I would lean towards a fan or fan connector concern.

I dont know how handy you are or how much you understand electron flow, without having a scantool to actuate a fan relay your going to need to send power from the relay (pull it and take a jumper wire from the battery to the now empty pin 87 in the PDC... If the fan comes on you know the fault is before, if the fan doesnt come on you know its after, in that circuit or the fan itself.
__________________
2005 Jeep Grand Cherokee - Gone but not forgotten!

Reply With Quote
  #4  
Old 07-09-2012, 03:06 PM
Member
 
Join Date: Jan 2012
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1794
JeepWK07 is on a distinguished road
Re: Radiator Fan Not Working

So It ended up being the fan motor. When the car was running I would hit the motor with a mallet and I would get it to kick on for a bit and then it would give out until I hit it again. The radiator fan is pulled and the new one is on order.
Reply With Quote
  #5  
Old 07-09-2012, 03:08 PM
SvenskaJeepGuy's Avatar
Let's Roll
My Jeep: 2005 4.7L WK
 
Join Date: Dec 2009
Location: Scranton PA
Posts: 13,096
Thanks: 141
Thanked 169 Times in 158 Posts
Rep Power: 1256192
SvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond repute
Garage
Re: Radiator Fan Not Working

i just noticed my radiator fan is not working either , my engine fan works but not the smaller one on the radiator. could this be why my engine temp is running a tad high? wouldnt the air while driving at highway speeds keep it lower than the halfway mark? is the radiator fan only supposed to come on during idle?
Reply With Quote
  #6  
Old 07-09-2012, 07:03 PM
Madanio24's Avatar
Senior Member
My Jeep: 2005 3.7L WK
 
Join Date: Jan 2012
Location: Eastern Shore MD/NJ/NY
Posts: 2,010
Thanks: 39
Thanked 35 Times in 34 Posts
Rep Power: 12185
Madanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond reputeMadanio24 has a reputation beyond repute
Garage
Send a message via Skype™ to Madanio24
Re: Radiator Fan Not Working

Yes it would at highway speed. The radiator fan only turns on once the temperature reaches a certain temperature I believe its about half. But on highway speeds it should run very cool.
__________________
Matt
-05 WK Black
Too many mods to list...
-90 Integra GS
Reply With Quote
  #7  
Old 07-09-2012, 07:43 PM
2005JGC's Avatar
Senior Member

My Jeep: 2005 4.7L WK
 
Join Date: Nov 2010
Location: Portland, OR
Posts: 2,751
Thanks: 51
Thanked 70 Times in 59 Posts
Rep Power: 1653778
2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute
Re: Radiator Fan Not Working

Your electric fan WILL turn on with your A/C switched on, I was 100% certain it did BEFORE I went out to test it simply so I could say I tested it. So for clarification, I just tested it on my own rig, and the electric fan turns on with the A/C on.

Having said that Matt, as I already suggested, when its hot out I run right at the middle hash mark, when its cool I run just mm or 2 below, with a known fully functional fan. It has done this for the 1.5 years I have had it, first noticed while I was towing and it freaked me out for a second but it has NEVER gone above the 1/2 hash mark. Not to say that a new temp sensor may not resolve the gauge issue as I think there is a resistance range where it sits at the 1/2 mark, this way the user doesnt see temperature fluctuations, but if the sensor or circuit wears just beyond its happy zone you may see some gauge fluctuation. Ultimately the temperature sensor is an NTC thermistor, as the temperature goes up the resistance goes down, so that pretty much scratches a circuit fault unless somehow the minimal resistance in the circuit finds a way to get even less on the same size wire. So your looking at a gauge concern, or a temp sensor concern... or its just straight up normal and someone at chrysler dropped the ball on this one... either way your cooling system is likely working just fine.
__________________
2005 Jeep Grand Cherokee - Gone but not forgotten!

Reply With Quote
  #8  
Old 07-09-2012, 08:04 PM
SvenskaJeepGuy's Avatar
Let's Roll
My Jeep: 2005 4.7L WK
 
Join Date: Dec 2009
Location: Scranton PA
Posts: 13,096
Thanks: 141
Thanked 169 Times in 158 Posts
Rep Power: 1256192
SvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond repute
Garage
Re: Radiator Fan Not Working

Im just worried that something was done incorrectly by the body shop when replacing my front end. It seems like i will have to figure out when the radiator fan is not working at all. I know the coolant is messed up. It is half green and half the mopar coolant. I drained as much of the green crap they used as possible but i didnt wanna spend $100 to buy more mopar coolant.
Reply With Quote
  #9  
Old 07-09-2012, 08:06 PM
SvenskaJeepGuy's Avatar
Let's Roll
My Jeep: 2005 4.7L WK
 
Join Date: Dec 2009
Location: Scranton PA
Posts: 13,096
Thanks: 141
Thanked 169 Times in 158 Posts
Rep Power: 1256192
SvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond reputeSvenskaJeepGuy has a reputation beyond repute
Garage
Re: Radiator Fan Not Working

I just dont want to be driving to florida in 95 degree weather for 16 hours and have my jeep overheat. Based off what you said to me the other day i determined it is not the temp sensor so i returned that part
Reply With Quote
  #10  
Old 07-09-2012, 10:28 PM
2005JGC's Avatar
Senior Member

My Jeep: 2005 4.7L WK
 
Join Date: Nov 2010
Location: Portland, OR
Posts: 2,751
Thanks: 51
Thanked 70 Times in 59 Posts
Rep Power: 1653778
2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute2005JGC has a reputation beyond repute
Re: Radiator Fan Not Working

No doubt, I completely understand your fears! I would suggest you go and have the body shop pay to FLUSH your system, mixing the two is bad bad bad.
__________________
2005 Jeep Grand Cherokee - Gone but not forgotten!

Reply With Quote
  #11  
Old 10-25-2016, 10:20 AM
New Member
 
Join Date: Oct 2016
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
sandyrider is on a distinguished road
Question Re: Radiator Fan Not Working

my 2010 Jeep Patriot Latitude got to the halfway point on a trip last week, then indicator came on saying hot so had to stop.. Had plenty of antifreeze, no leaks. we let it cool off then went home . i have to drive it to work and and in the mornings it is ok, but in the warm afternoon i can not let it idle., or the temp. gauge goes up. When i got home yesterday i left it idling and fans did not come on. fuses ok. What's next? thanks
Reply With Quote
  #12  
Old 10-25-2016, 11:00 AM
WK2OverlandII's Avatar
Quadra-Drive II
My Jeep: 2014 3.0L WK2
 
Join Date: Nov 2010
Location: PA WILDS
Posts: 574
Thanks: 248
Thanked 55 Times in 49 Posts
Rep Power: 18440
WK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond reputeWK2OverlandII has a reputation beyond repute
Re: Radiator Fan Not Working

The clutch in the fan is probably bad and needs replaced. I'm military...when I was in the desert a number of times the clutch fan would go out on the HMMWV's....so we would "unplug it" and it would cause the fan to run all the time and kept the engine cool. It would decrease the engine power but we kept moving...often keeping us moving and safe yet another day.

I'm pretty sure that's your problem...they use to go out often on the 4.7L V8's too.
__________________
2014 JGC Limited - Granite/Black - 3.0L ECODiesel - LUX II - NAV - Off Road II- Block Heater.
__________________________________________________ ____________________________

On order: 2017 JGC TrailHawk - Billett Silver/Black - 3.0L ECODiesel - LUX II - NAV - Active Safety -
Blind Spot - Rock Rails - Block Heater.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
radiator fan yev_martin Troubleshooting/Problems 2 02-21-2012 11:39 PM
Radiator Fan mbriddle Grand Cherokee - WK2 - 5 10-10-2011 05:57 PM
Radiator Fan not working wj 2000 violant00 Troubleshooting/Problems 6 08-15-2011 02:25 PM
2003 Radiator Fan JeepMe Troubleshooting/Problems 3 04-28-2011 01:35 PM
Problem with Radiator Fan???????? Please HELP Jdpur816 Troubleshooting/Problems 18 07-25-2010 08:41 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:31 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.