Onley work on 4 speed
Most likely cause is the blower motor resistor block. 1,2and 3 go through the resistor forth speed is is full blast therefore bypasses the resistor being the only speed setting that works when the resistor has failed
SOURCE: 2004 Ford F150 - AC/Heater blower speed 1 & 2 not working.
You might have a bad speed selector switch, or your blower motor resistor is faulty.
SOURCE: Blower only works on 4 (top speed)
sounds like you need the blower speed resistor...once you put in the new one it will work just fine.......
SOURCE: heater blower not working on seting 1 2 or 3 but
You'll need to check the voltage coming out of the switch. If it proves to be okay than you'll have to replace the resistor block in the heater box, this is a small rectangular black plastic plate with four wires connecting to it. It should be located under the hood on the passenger side firewall. Remove the two 5/16ths retaing screws and remove the block. To replace reverse the order given here. Thank you, Dana
Testimonial: "thank you very helpful info "
SOURCE: heater blower only works on the 2 highest speeds
it could be the blower motor resistor, this is what gives the motor different speeds, they are very common to burn out 1 or 2 speeds. They are not very expensive, I would look into that first
SOURCE: Speedometer and Heat blower not working
The fan motor has gone out,it was bad before it went out,drawing too many amps,so it took the blower motor resister out with it.The resister is next to the blower motor.On the speedo,check,or replace the speed sensor in the transmission,
323 views
Usually answered in minutes!
×