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1995 Chevrolet Lumina Fans Won't Spin

1995 CHEVROLET TRUCK
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SRGSCHULTZ
  • MEMBER
  • 1 POST
I noticed my car started overheating when it got really cold this winter. Neither of the two fans on the radiator spin when the car is hot or when I turn on the AC. I replaced the fan relays and that didn't help. I know the fans are fine because if I stick a piece of wire in where the relays go they spin just fine. I checked the fuses and they seemed fine as well. What is most likely the problem that would take both of those fans out at once, but keep power going to the relays? Also if you have a guess let me know where the part is located on the car. Trying to follow that bundle of wires is next to impossible. Thanks.
Feb 1, 2006 at 7:10 AM
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SC1 RACING
  • ✓Experienced Mechanic
  • 117 POSTS
you have 2 temp sensors one on head and 1 on intake. they determine when the fans kick on. you will need to test to see which one operates the fan. i beleive on that car it is the one on the intake. not 100% sure.
Feb 3, 2006 at 5:56 AM
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Suggested Repair

Test the two temperature sensors that control fan operation—one on the cylinder head and one on the intake—to determine which one turns the fans on. The expert believes the intake sensor is the one that operates the fans on this car, but that should be verified by testing.

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Conversation Summary

The owner of a 1995 Chevy Lumina reports that neither radiator fan runs when the engine is hot or when the AC is on, and the car overheats in cold weather. The relays were replaced and the fuses appeared fine, and the fans spin when the relay sockets are jumped, so the fans themselves work. The expert says two temperature sensors, one on the head and one on the intake, determine when the fans come on, and recommends testing them, believing the intake sensor is the relevant one but not being certain.

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