98 Lumina air comes thru defrost only and fans won't turn on

Tiny
DENTALJENTX
  • MEMBER
  • 1998 CHEVROLET LUMINA
  • 175,000 MILES
1998 chevy lumina 3.1
after replacing battery my car is now running hot, but if I turn on the heat it seems to fix problem, but heat and air only coming thru defrost vents, also the big fans by radiator are not coming on. Ever. The overheating prob worse in stop and go city traffic, my guess is on the frwy, the car gets enough air flowing thru it, but I usually leave the heat on 1 anyway, if the temp gauge goes up I turn heater up. Scared cuz Tx summer is coming and i'm going to bake if problem isn't fixed.

looked for obvious wear. Hoses etc, have recently replaced serpentine belt, harmonic balancer, then tensioner pulley, that was cuz car kept dying and when I was jumping it I noticed the serpentine belt was chewed up which led to other parts being replaced, never addressed battery dying all the time, but figured out the ignition switch is hinky and must be 'just so' or I get like a parasitic drain.

the fans won't turn on no matter what.
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Saturday, April 27th, 2013 AT 10:20 AM

2 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Does radiator fan/s run if you turn on ac? If you unplug the coolant temp sensor will the radiator fan run? Did you check voltage and ground at fan connector?
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Saturday, April 27th, 2013 AT 12:23 PM
Tiny
JDL
  • MECHANIC
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Check applicable fuses. Not only checxk the fuse, check for voltage on fuse circuit.
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Saturday, April 27th, 2013 AT 12:29 PM

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