Defective blower motor resistor module. this is true except if the control module is malfunctioning at which point the defrost goes to emergency mode in which the defrost will stay on permanently. My module will not power up and I need help with wiring schematics to find a bad ground or power wire
Bad blower resistor? Bad low speed relay? Bad switch?
replace the blower motor resistor
If the blower runs on high it will get hot. If the blower is wearing out this will cause it to get to hot and blow.
Replace the high speed relay.
The blower motor resistor is defective.
needs new blower resistor
More than likely the blower motor speed resistor burned out.
the blower resistor is bypassed on high. a direct path to ground. if high is the only operational speed the resistor is bad.
you need a new blower motor resistor
blower motor resistor is bad
Sounds like your Blower motor resister, it controls the voltage to your blower motor, controlling the speeds, if you always have it on high, med ect. that speed is more likly to burn out first
The blower motor speed resister is probably burned out.