Jason86
Thread Starter
Intermediate
Joined: Mar 2011
Posts: 25
Likes: 16
From: DFW Metroplex
Jason86
What controls the electric fan IN FRONT of the radiator, ONly comes on when I ground out the relay. Is is suppose to come on immediatley when the AC is on?. Primary fan works fine. Car got to 242 and front fan never came on. Any ideas or fixes
Thanks
Thanks
Safety Car
Joined: Aug 2009
Posts: 3,751
Likes: 275
From: Melbourne, Victoria, Australia
re a/c condenser fan
Hi Jason86
The h/d fan (in front of condenser coil) is activated by the temp sensor on the right side of the engine, its near the dipstick. it's a brass color when its grounded the fan will go on. It is fitted as a heavy duty cooling system.
The ecm controls the main fan when the head pressure or a/c reaches around 240 psi, via sensors in the liquid line near heater/a/c box in engine bay and it also activated by ecm as engine is warm to control coolant temp. The fan you are talking about only turns on when the engine temp reaches above 115 deg c. pull the wire of the sensor and ground it and the small fan will run with ignition on.
The h/d fan (in front of condenser coil) is activated by the temp sensor on the right side of the engine, its near the dipstick. it's a brass color when its grounded the fan will go on. It is fitted as a heavy duty cooling system.
The ecm controls the main fan when the head pressure or a/c reaches around 240 psi, via sensors in the liquid line near heater/a/c box in engine bay and it also activated by ecm as engine is warm to control coolant temp. The fan you are talking about only turns on when the engine temp reaches above 115 deg c. pull the wire of the sensor and ground it and the small fan will run with ignition on.
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
While you are at it be sure to clean out the crud between the radiator and the AC condenser. This will help it run cooler as more air will pass over the radiator coils. Gives you peace of mind too.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Your Vette will suck up all manner of crap because of where the inlet is. Be careful to not pull all the way up over piles of leaves or mulch landscaping.
