Question about Saab Cars & Trucks
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Posted on Jan 02, 2017
HELLO. IT SOUND'S LIKE YOU COULD HAVE A BAD RADIATOR FAN SENCER.!!! THAT NEED'S TO BE CHANGED.!!! IT WHAT CONTROL'S THE RADIATOR FAN.!!!THAT TURN'S IT ON & OFF.!!!"GOOD LUCK"
Posted on Aug 09, 2008
There should be a relay controlling them, check the relay comm for power.. You can connect the radiator fan driectly to the battery to prevent over heating. It has two wires, splice them and connect them to the battery via 2 other pieces of wire. In my opinion its very difficult to actually help with this one remotely since we would need to be on spot to test the circuit. I strongly suggest haveing an autoelectrican check this for you. YOu can connect the radiator fan directly to the battery to help you get there..
BTW the radiator contains a thermostat. this turns the fan on and off, of this is faulty you will have the problem you described. check the thermostat in the radiator.
Posted on Feb 07, 2009
I would suspect that the cooling fan relay ( in a relay / fuse box under the hood) is stuck. There are 2, a high and low speed relay. Pull one and see if the fan goes off. Once you have identified the culprit, see if there is an identical relay in another location that you can swap into place to verify the problem is fixed.
Posted on Mar 25, 2009
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Oct 28, 2017 | Saab Cars & Trucks
Dec 22, 2016 | 2002 Saab 9-5
Physically look in the radiator under the cap when cool, for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, try backflushing it, or replace.
Thermostat stuck open or shut, replace it.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.
Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it's loose, airflow can actually push it out of place making it useless or blocking the airflow. Along with that, there may also be a plastic piece attached to the bottom of, and wraps up behind the bumper. If it's loose, airflow can actually push it out of place blocking the airflow. Simply reattach it with 4 or 5 screws.
Also, if the vehicle has A/C and electric fans, one fan is dedicated to the A/C and should come on almost the instant the A/C is turned on. The engine fan will run even with the key off, that is normal. The system is trying to cool itself. Hope this helps.
You can simply replace or unplug the sensor. Unplugging it should turn off the warning light and won
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