2004 Toyota Corolla Q&A
2004 Toyota Corolla Question: Why does the heater fan resistor continue to burn out?
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. - milesauto
also could be bad wire harness. ck for burn't wires at the plug - globalhelper