You can tell if the blower motor resistor has failed by testing for voltage where the harness plugs into the blower motor. Here’s how to test a blower motor with a multimeter (electrouniversity)īlower motor resistors come in many shapes and sizesĭepending on how your particular model year of Silhouette’s blower motor resistor question, it will still be able to turn on the blower motor when you turn the speed all the way up. If air starts blowing at full blast, suspect the blower motor resistor. If all the dash lights are on, the climate control system looks like it should be working, and no air moves, you should suspect the blower motor.īefore replacing it, turn the fan up to its highest setting. If you don’t hear any noise coming from the blower motor, the air conditioner not working check these two items.īlower motors are known to fail without warning. However, there are a few less common reasons as well. When there’s no air flowing through the van’s cabin, a bad blower motor usually causes this scenario. If your Oldsmobile Silhouette has no air moving through the climate system at all, that’s a lot easier to diagnose than the air that is blowing not being cool enough. There are just too many variables otherwise. No air moving at all is usually a bad blower motor.When the cooling system is suddenly not blowing cool enough, check the condenser up front for debris (quick and easy).Knowing whether or not the system has a charge is vital to a proper diagnosis. The other two deal with air temperature, and there can be quite a few causes for a failure to cool condition. The first section, not blowing air at all, is pretty straightforward. Jump straight to the one that best describes what is going on with your Silhouette. Not blowing air at allNot blowing cold enoughNot blowing cool air This article is broken down into these three sections to help save you time repairing your Silhouette’s broken AC system: There are A LOT of issues that can cause your van’s air conditioner to fail.
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