Whether you drive a Subaru or a Lexus, your car needs antifreeze. Common Causes of Losing Coolant (But Don’t See a Leak)Ĭommon Causes of Losing Coolant (But Don’t See a Leak).If there is anything that you would like to add, please leave a comment below. But, you don’t want to miss the easy fixes before you start testing wiring. After that, the order isn’t so important. Of all the ones listed above, start with the coolant level, then check the fuse. There are many reasons why your Saab 9-3’s radiator fan is not working. If everything else seems on the up and up, the springs in the fan clutch have worn past the point of proper function and can no longer do their job. Like any other clutch, a fan clutch will wear out over time. Adding coolant to a radiator dry enough not to trigger the engine temp sensor can cause problems from drastic temperature change. If you do have low coolant, don’t fill it up until the engine has cooled off. Your 9-3’s radiator fan will not kick on. Without the coolant hitting the sensor, the temp reading will be significantly lower than the actual engine temp. But, there won’t be enough coolant to reach the temperature sensor. If the engine coolant level isn’t high enough to keep pressure in the engine it will run hot. If it does end up being this sensor, they are very affordable. Depending on the model year and engine, the location varies. You’ll need to locate and test the engine temp sensor. 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. Once the temp gets so hot, the ECU commands the radiator fan to come on.
Your engine temperature sensor is responsible for relaying your engine temp to the ECU.
#SAAB 9 3 COOLANT LEVEL LOW HOW TO#
This video from Ratchets and Wrenches is a phenomenal resource on how to properly diagnose a wiring problem. But if it’s not, which means the fan has gone bad. If it is getting 12+ volts, the fan should be coming on. You can test the voltage going from the fan relay to the fan itself. The fan wiring is some of the more vulnerable wiring in your 9-3. Your author has personally had a shredded tire completely pull the fan wiring out of his vehicle. Unless the wiring issue is fixed, the fuse will blow again. If it is blown, replacing the fuse will only solve the problem for a very limited period of time. The first thing that you would want to do is locate the fuse for your 9-3’s radiator fan and make sure that it hasn’t blown. Here are the most common reasons that your radiator fan does not turn on:īefore poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. Although the fan itself can go bad, that’s definitely not the place to start a diagnosis. There are a few simple reasons that the fan would not be cycling on. If your 9-3 is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. They are designed to only run when needed. Just because the radiator fan is not on does not mean that it is not working. If the radiator fan is not working, it’s a serious problem. It is the last line of defense between you and an overheating engine.
Your Saab 9-3‘s radiator fan has one of the most important jobs on the vehicle.
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