Sep 21, 2015, 03:49 PM
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- Jeep Grand Cherokee WJ 1999 to 2004 Crash Test and Safety Ratings
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XJ Ask the Question Thread
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Is that confirmed with an IR thermometer or going off the dash? 1996 and prior XJs have a separate sensor to drive the dash gauge from the one the PCM uses to trigger the aux fan.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: May 2011
Posts: 1,458
Likes: 2
From: Glendale,Az
Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
Seasoned Member
Joined: Nov 2012
Posts: 285
Likes: 0
Model: Cherokee
well I just replaced the thermostat and housing to fix the problem of it not reading correctly, it actually did overheat once and the fan didn't turn on before or after it cut out
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Non-working efans aren't uncommon. I forget if it's usually a relay problem or temp sensor. I think it's usually the fan's temp sensor, depending on the year. I just wired my fan to a switch and stopped worrying about it.
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Neither of those have anything to do with the two temperature sensors you may or may not have on your undisclosed model year lol
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Like this? It's much more polite than the first one. Feel free to use it, HolySirSalad.
Thanks for your post.
We’re here to help but you must understand that all Jeeps are not the same.
In order for us to give you more accurate advice and help, we must know the following, along with detailed information as to the symptoms/problems etc:
Year
Model
Engine
Transmission
The first one:
Sounds harsh but just makes sense:
"Let’s play a game.
You pretend that you are the only one that knows what year/engine/model, etc that you are asking about.
We will all pretend you never asked a question until you provide at least the bare minimum of information about your vehicle".
Seasoned Member
Joined: Oct 2013
Posts: 361
Likes: 0
From: Los Angeles Ca.
Model: Cherokee
Hey guys, so I left my (ignition) on the other day for four hours! Is there a possibility I fried something?? It started up immediately and the lights an everything were bright as usual.. I don't understand how it didn't fry something or did it ? 1990 xj 4.0 L
CF Veteran
Joined: Oct 2011
Posts: 1,812
Likes: 0
From: South Mills, NC
Year: 1998
Model: Cherokee
Engine: Rebuilt 4.0L I6
How would it have fried something? All it would have done was drain your battery but it started up fine so your good.
CF Veteran
Joined: Feb 2011
Posts: 1,048
Likes: 0
From: Georgia
Year: 2004
Model: Grand Cherokee (WJ)
Engine: 4.0 Inline 6
This has probably been beat to death but I will ask anyway. When I bought my 98 Cherokee Sport the a/c compressor would not cut on. Added some freon and it started working. Obviously the low pressure switch. I figured there was a freon leak, and I was right. Last summer 2 cans of freon, this summer just 1 can got me by.
So now the weather is cooling off and I need to use my heat. Well, I have never had this problem before but now the windows are fogging up really bad when I run the heat. The freon was a little low so I added a can to help dry the air when running the defrost. It helped a little but not enough to remedy the problem.
I know what you are going to say. The heater core is going out. Well, I checked it and it seems to be okay. I do not have any leaking going on inside on the floor board. Flushed the heater core out, blew it out with air just to make sure it was not clogged or dirty. No issues there. Refilled with coolant and burped.
After cranking it back up and letting it run, I noticed my temp gauge actually went up to midway. Something I have not seen in a while. Temp has been staying down kind of low like the thermostat is staying stuck open? With the temp gauge at half way, heat was blowing super hot and no fogging.
Get in the heep last night to come home from work and it is cold out. Turn on the heat and dang it if the whole thing does not fog up again. Temps is not going up to half way point either like it was earlier in the day after flushing heater core. I don't know if messing with the heater core hoses at the t-stat housing maybe jarred the t-stat loose where it was functional temporarily? Would a bad t-stat stuck in the open position cause window fogging?
I don't want to start screaming bad heater core just yet because it flushed out clean. Just a tad bit of dirty coolant came out. And no leaking or coolant smell inside the vehicle.
Any help or tips how to trouble shoot problem would be great.
So now the weather is cooling off and I need to use my heat. Well, I have never had this problem before but now the windows are fogging up really bad when I run the heat. The freon was a little low so I added a can to help dry the air when running the defrost. It helped a little but not enough to remedy the problem.
I know what you are going to say. The heater core is going out. Well, I checked it and it seems to be okay. I do not have any leaking going on inside on the floor board. Flushed the heater core out, blew it out with air just to make sure it was not clogged or dirty. No issues there. Refilled with coolant and burped.
After cranking it back up and letting it run, I noticed my temp gauge actually went up to midway. Something I have not seen in a while. Temp has been staying down kind of low like the thermostat is staying stuck open? With the temp gauge at half way, heat was blowing super hot and no fogging.
Get in the heep last night to come home from work and it is cold out. Turn on the heat and dang it if the whole thing does not fog up again. Temps is not going up to half way point either like it was earlier in the day after flushing heater core. I don't know if messing with the heater core hoses at the t-stat housing maybe jarred the t-stat loose where it was functional temporarily? Would a bad t-stat stuck in the open position cause window fogging?
I don't want to start screaming bad heater core just yet because it flushed out clean. Just a tad bit of dirty coolant came out. And no leaking or coolant smell inside the vehicle.
Any help or tips how to trouble shoot problem would be great.