Radiator fan not coming on.
12-08-2012, 04:51 PM
#1
Racer
Thread Starter
Radiator fan not coming on.
The one fan comes on when the a/c turns on but the other fan seems to be not coming on at all. I waited for normal operating temperature and it still didn't come on. At what temperature should that be coming on ? And what would the problem be ? I have a 1994 corvette.
Last edited by Erniep; 12-08-2012 at 05:48 PM.
12-08-2012, 05:28 PM
#2
Look at the driver's side top of the radiator. There are two relays there. Switch them and see if the problem moves to the other fan.
ETA Digital dash temp gauge, driver side fan on at 228, off at 218 -- passenger side fan on at 235, off at 225
Also, this is assuming you're speaking of the 1994. IMO it's best to put the model year in the title and/or body of the post and not rely upon people seeing either your signature or your garage.
ETA Digital dash temp gauge, driver side fan on at 228, off at 218 -- passenger side fan on at 235, off at 225
Also, this is assuming you're speaking of the 1994. IMO it's best to put the model year in the title and/or body of the post and not rely upon people seeing either your signature or your garage.
Last edited by 94z07fx3; 12-08-2012 at 05:33 PM.
12-08-2012, 05:47 PM
#3
Racer
Thread Starter
Yes I am talking about the 1994 corvette. The driver side fan came on when I turned the a/c on. When I shut off the a/c, the fan shut off about a minute after. Passenger side never came on. I will try to switch the relays tomorrow. Thanks..
12-08-2012, 06:30 PM
#4
Race Director
What temp is being displayed on the digital temp gauge?
12-08-2012, 06:49 PM
#5
Drifting
Member Since: Sep 2003
Location: 1994 LT1 Coupe 6-speed with FX3 & 2000 LS1 Vert 6-Speed with F45 Hunterdon County, NJ
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1. Digital Dash Coolant sensor registers coolant temp greater than 235 degrees F.
2. If A/C is running and High side pressure exceeds 235 psi (will not normally occur unless system is overcharged or air temp is over 85 degrees F).
Regarding the driver side fan (primary), without the A/C turned on, it will only come on if digital coolant temperature exceeds 228 degrees F.
12-09-2012, 04:55 PM
#7
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Make sure you use the digital guage when check the temps because it's alot different than the analog one. My analog guage will look like its getting ready to overheat but the digital won't even be over 200 !
12-11-2012, 10:41 AM
#8
Le Mans Master
By "other side", do you mean the passenger side? If so, the passenger side fan (aka Secondary Fan) will only come on IF one of the following occur:
1. Digital Dash Coolant sensor registers coolant temp greater than 235 degrees F.
2. If A/C is running and High side pressure exceeds 235 psi (will not normally occur unless system is overcharged or air temp is over 85 degrees F).
Regarding the driver side fan (primary), without the A/C turned on, it will only come on if digital coolant temperature exceeds 228 degrees F.
1. Digital Dash Coolant sensor registers coolant temp greater than 235 degrees F.
2. If A/C is running and High side pressure exceeds 235 psi (will not normally occur unless system is overcharged or air temp is over 85 degrees F).
Regarding the driver side fan (primary), without the A/C turned on, it will only come on if digital coolant temperature exceeds 228 degrees F.
This is the way it should work.Be happy your right side fan is not running and you are not at 235*. Sounds like your car system is working fine.
12-11-2012, 12:28 PM
#10
Racer
Thread Starter