Why is the radiator not working on my Saab 9-3?
Your engine temperature sensor is responsible for relaying your engine temp to the ECU. Once the temp gets so hot, the ECU commands the radiator fan to come on. If your 9-3 has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor.
Why is the low speed fan not working on my Saab?
If the fan never comes on after the engine is shut off, the low speed circuit may not be working. If the fan resistor burns out, or if the low fan speed circuit fails for other reasons, the fan will continue to cycle on the high setting to cool the engine, but the coolant (and engine) temperature will run about 10-15 degrees C high.
How to test the fan on a Saab 900?
Use Fuse Taps (from RadioShack etc.) or similar flat contacts in the relay socket to avoid damage to the socket. To measure the fan current, put a meter set to a 20-amp range in series with the test leads, across contacts 30 and 87. It is safer to test the fan curent with engine off:
What does it mean if your Radiator is not working?
If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed.
Why is the radiator fan not working on my Saab 9-3?
Without the coolant hitting the sensor, the temp reading will be significantly lower than the actual engine temp. Your 9-3’s radiator fan will not kick on. If you do have low coolant, don’t fill it up until the engine has cooled off.
What kind of coolant does a Saab 9-3 use?
The picture below is for a 2004 Saab 9-3 Arc and also shows the flow direction of the coolant in the system (in case you were curious): This job will require disconnecting components above and below the engine compartment such as air hoses, the radiator fan cowling and the intercooler and condenser attached to the radiator.
Where is the radiator located on a Saab?
For those that aren’t familiar with vehicle cooling systems the radiator is usually found in the front of the car behind the grill and front bumper, and in front of the radiator fan. The picture below is for a 2004 Saab 9-3 Arc and also shows the flow direction of the coolant in the system (in case you were curious):
Use Fuse Taps (from RadioShack etc.) or similar flat contacts in the relay socket to avoid damage to the socket. To measure the fan current, put a meter set to a 20-amp range in series with the test leads, across contacts 30 and 87. It is safer to test the fan curent with engine off:
The picture below is for a 2004 Saab 9-3 Arc and also shows the flow direction of the coolant in the system (in case you were curious): This job will require disconnecting components above and below the engine compartment such as air hoses, the radiator fan cowling and the intercooler and condenser attached to the radiator.
If the fan never comes on after the engine is shut off, the low speed circuit may not be working. If the fan resistor burns out, or if the low fan speed circuit fails for other reasons, the fan will continue to cycle on the high setting to cool the engine, but the coolant (and engine) temperature will run about 10-15 degrees C high.