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?

Asked by for the 1999 Buick Century
1 answer
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