Cooling fans not running.

Subject: Cooling fans not running. Tue Jul 10, 2012 8:31 pm

I noticed that the cooling fans are not running on my "96 SC'd Riv. All related fuses check out as well as the relays...I think. I powered them up and could hear and feel them operate. So that leaves the temp sensor in the radiator itself. Am I missing anything here, and could it be something else? Does anyone have a part number for it? My searches are leading me nowhere. Also, is there any way to test the sensor?
Thanks, Rick

Subject: Re: Cooling fans not running. Tue Jul 10, 2012 9:12 pm

What is your coolant temp gauge reporting? Fans may not turn on until above 220ºF. Do the fans turn on when you have the AC on?

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch
^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown

Subject: Re: Cooling fans not running. Tue Jul 10, 2012 9:39 pm

Aaron, I just went and checked one more time, fans are working. Started car, fans run, AC on, fans running. Road test, up to temp(200 deg.) fans running, although rather slowly. So, don't know what to think.
Rick

Subject: Re: Cooling fans not running. Tue Jul 10, 2012 9:58 pm

Our radiators are pretty good at keeping the engine cool without much help. As long as your coolant temp stays around 200, you don't really need the fans. The engine is happy between 180-210ºF. If you want it to run cooler while cruising, try a 180º thermostat. A $10 mod that takes some of the worry out of heavy throttle on hot days.

_________________
'05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26

'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes

'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch
^^^ SOLD ^^^ frown

'70 Ninety-Eight Holiday Coupe 455cid • 116k miles
^^^ SOLD ^^^ frown

Subject: Re: Cooling fans not running. Tue Jul 10, 2012 10:02 pm

Thanks for the replys, Aaron. I think I'll stick with the current T-stat. The Riv has a" for sale" sign in her, so just want to make sure it's solid for the next owner.

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