Why does the heater fan resistor continue to burn out? on 2004 Toyota Corolla

It will work for 2-3 weeks then burn out again. Does the fan motor need replacing? What can I do to fix tbis? Thank you.

by in Shepherdsville, KY on January 31, 2013
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2 answers 3 comments
ANSWER by , January 31, 2013
Could be the fan motor. The way to check it is to connect a amp meter to see if it could be pulling too much aperage...also check the wire connections paticularly at the resistor itself.
COMMENT by , January 31, 2013
A new blower motor is $70 and I replaced the resistor 3 times. I hope the new motor fixes the problem. Thanks so much for your help.
COMMENT by , January 31, 2013
Agree with miles. Be sure to check 'closely' the connectors at the resistor and motor for any signs of heat/melted plastic/discoloration at the terminals ect. Replace as needed. Poor connection = high resistannce = heat = new parts failure!!
COMMENT by , January 31, 2013
This is my sisters car she purchased new. She had SEARS AUTO CENTER install the first resistor. They spliced some heater leads for unknown reason, I guess for a test. I need to check these closely.
ANSWER by , January 31, 2013
also could be bad wire harness. ck for burn't wires at the plug