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Q: Heater Fan only works on HIGH setting. on 1999 Buick Century

My 1999 Buick Century blower fan only worked when on HIGH setting so I REPLACED the heater blower motor resistor. All other setting worked fine for a day. Now it only works on HIGH again. Any suggestions what the issue may be?

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the reason these burn out is either the connector is melted and overheated or the blower motor is pulling too much amperage overheating these items.

Roy
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