C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Overheating

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Old Feb 16, 2007 | 03:35 PM
  #1  
ddsovy's Avatar
ddsovy
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From: Pasco WA
Default Overheating

Took the car for the first ride of the year today. When the temp started to climb I turned the AC on to trigger the cooling fan but it did not come on... It climbed to about 230 before I could get out of traffic and drive at hiway speeds. When I got home I checked the fan by grounding the common ground and the fan came on. checked the fuse at the fuse panel; it was good. What does this tell me? ECM or what. And what should I check next? Thanks for the input. Does the 94 monitor the outside air temperature and could this be why the fan did not come on when I turned on the AC? I know turning on the AC triggers the fan to come on.

Last edited by ddsovy; Feb 16, 2007 at 03:46 PM.
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Old Feb 16, 2007 | 03:49 PM
  #2  
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Ttime
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From: Colorado Springs CO
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Originally Posted by ddsovy
Took the car for the first ride of the year today. When the temp started to climb I turned the AC on to trigger the cooling fan but it did not come on... It climbed to about 230 before I could get out of traffic and drive at hiway speeds. When I got home I checked the fan by grounding the common ground and the fan came on. checked the fuse at the fuse panel; it was good. What does this tell me? ECM or what. And what should I check next? Thanks for the input. Does the 94 monitor the outside air temperature and could this be why the fan did not come on when I turned on the AC? I know turning on the AC triggers the fan to come on.
Check your fan relays .
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Old Feb 16, 2007 | 05:15 PM
  #3  
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94ZR1
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From: No Opti Here Tn
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Originally Posted by Ttime
Check your fan relays .

230 is not all that hot but the fans should have come on
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Old Feb 17, 2007 | 02:35 AM
  #4  
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From: Lahaina Hi
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If you have a 94 you have 2 fans.The primary should come on about 195 or so.The pass side fan should come on when you turn the A/C on.
I would check the relays the connection could be rusty.
Check the fuss on the pass side where the washer bottle is .
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Old Feb 17, 2007 | 08:43 AM
  #5  
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ittlfly
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From: Sun City West Az
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Sounds llike your relay(s) are bad. Check for 12v inbound and (upon command) outbound to the fan.
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