Question about 2001 Pontiac Grand Am SE

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The fan is cutting out/not working

2001 Pontiac Grand AM

The fan doesnt work on one and two and recently the three four and five have been cutting out or just not blowing very much air. What do you think it would be?

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There are usually three possibilities for this problem, which can only be solved by hands-on electrical testing, in most cases. You could have a bad switch, you could have a bad blower motor, or you could have a bad blower motor resistor. If the bearings in the blower motor begin to seize, it will take more force (read: more electricity) to turn against the friction of the bearings. This may explain why it does not work until a higher setting, and even then it may not work well. On the other hand, if the blower motor itself is okay, the delivery of electricity may have a problem. Your blower motor has a resistor, and this resistor can over time go bad, even rust, which will not allow the full amount of current to reach the blower motor, thus causing it to not run. I usually replace blower motors with a new resistor, but if just the resistor is bad, then only replace that. The switch thing is uncommon, but it is still a possibility, and I can't rule it out. Good Luck finding the problem, barring a complicated electrical issue, it should definitely be one of those three things that has failed.

Thanks for asking!

Posted on Nov 12, 2009


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