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99 lhs gets hot while sitting

  #1  
Old 09-15-2010, 07:39 PM
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Question 99 lhs gets hot while sitting

Hello everyone! I just recently purchased a 99 Chrysler LHS from a private owner. I am only the third owner of this car as the last owner only had it for 8 months as it was only used for transportation to and from work. The issue that I am having is that the temperature climbs to almost the red while sitting in park for about a half hour. But when I get back onto the road and moving it cools down to just below half on the gauge. The previous owner replaced the thermostat and did a coolant flush on March 12th at 29,505 miles. It now has 35,400 on the odo. Any ideas? I do live in SW Florida and the temps here have been around 100 degrees!! Brutal. Thank You in Advance!
 
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Old 09-15-2010, 08:01 PM
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I wonder if the cooling fans are not running and a 30 and a 40 amp fuse are blown in the PDC under the hood?
 
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Old 09-15-2010, 08:17 PM
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Thanks for the quick reply! I know when I start the car with a/c on I can here a fan running. Do Chrysler fans operate like Honda fans. With a/c off only one fan kicks on until temp goes up then the other kicks on and if you have the A/C on both fans run at same time. What do the 30 and 40 amp fuses operate? Do they run the fan motors? Thank You!
 
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Old 09-16-2010, 06:38 PM
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No, they both run at LOW or HIGH speed. I've replaced a MOTHERLOAD of those fan motors. Yeah there is a 30A they can blow and sometimes they blow the 40A next to it that feeds the compressor clutch. There is also a high and low relay. The noise between speeds is noticeable so next time the gauge creeps up take a listen and look to so what's going on. Maybe run it in your driveway and observe and take notes. Let me know what you see.

The Jeep Cherokee has a fan system like youre talking about. I don't know of any other Chrysler product that has that.
 

Last edited by TNtech; 09-16-2010 at 06:43 PM.
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Old 09-17-2010, 02:31 PM
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Thank You for helping! You are VERY knowledgeable on these products! OK here is what I have found...... The drivers fan motor NEVER kicks on EVER!! I did check the fuses and found the 40amp popped so I replaced it. I started doing fuse swaps checking to see if the 30a was shot but it wasn't. I also swapped between the 3 relays in the PDC and it did not make a difference. The driver's side fan never kicked on. Is that the high speed fan or low speed? Sounds like I need a fan motor?
 
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Old 09-17-2010, 02:33 PM
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Originally Posted by 99CHRYSLHS View Post
Thank You for helping! You are VERY knowledgeable on these products! OK here is what I have found...... The drivers fan motor NEVER kicks on EVER!! I did check the fuses and found the 40amp popped so I replaced it. I started doing fuse swaps checking to see if the 30a was shot but it wasn't. I also swapped between the 3 relays in the PDC and it did not make a difference. The driver's side fan never kicked on. Is that the high speed fan or low speed? Sounds like I need a fan motor?
Oh yeah by the way the passenger fan does work!!
 
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Old 09-17-2010, 08:26 PM
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stick your hand down there and move the fan I bet its locked up
 
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Old 09-18-2010, 05:15 PM
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Went and checked fan motor and it does spin by hand. Not locked up. Now I am really puzzled. Any ideas guys? Could it just be shorted out?
 
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Old 09-19-2010, 12:41 PM
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Originally Posted by 99CHRYSLHS View Post
Thank You for helping! You are VERY knowledgeable on these products! OK here is what I have found...... The drivers fan motor NEVER kicks on EVER!! I did check the fuses and found the 40amp popped so I replaced it. I started doing fuse swaps checking to see if the 30a was shot but it wasn't. I also swapped between the 3 relays in the PDC and it did not make a difference. The driver's side fan never kicked on. Is that the high speed fan or low speed? Sounds like I need a fan motor?

BOTH fans have to work. They don't operate independently. They work together at 2 speeds. High and Low. Looks like you found your problem. Just because they turn by hand doesn't mean there is not an open inside the motor.
 

Last edited by TNtech; 09-19-2010 at 12:45 PM.
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