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So the fan was playing up recently?
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Okay if the fan was playing up or acting erratic, then 99% it is the final stage resistor that is the problem. It is VERY common to fail and if you were getting erratic behavior, it is almost certainly the final stage.
It is located behind the dash on your vehicle, here is info to replace it: CLICK HERE
It is also possible that the blower motor itself has failed, but the final stage is more common.
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The blower is located at the base of the windshield, accessed through the engine compartment. Per this link: CLICK HERE
Please let me know if you have further questions.
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