Blower fan only works on high

Blower motor resistor bad ! Watch this video , Blower Motor Problems Auto Repair Help

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Try unplugging the blower motor, heater control unit and blower motor resistor. Replace the fuse then reconnect the items 1 by 1 and see what pops the fuse.

When the blower works only on the high setting its usually a bad blower resistor which is right near the blower motor. now you say it would always blow high regardless of the fan speed setting that would indicate probably the climate control unit or a connector problem somewhere. finally it not working at all may be the climate control unit or connection went bad even further. it might have a blown fuse or a bad blower motor in addition to the climate control unit or connector problem .check for power and ground at the blower motor. the power is supplied from fuses and may have a relay also. the ground is supplied from the climate control unit and goes through the resistor to control the fan speed. good luck

I would check all fuses associated with the HVAC, if all fuses are good and you are sure the new part you bought is good then the problem would be in the control unit.

Hi!!
When the Blower Motor Resistor (controls blower speeds) goes bad, the blower motor works only on HIGH SPEED. REPLACE IT.
BLOWER MOTOR RESISTOR Removal & Installation

• Disconnect negative battery cable.
• Remove right lower instrument panel insulator panel.
• Disconnect blower resistor connector located behind right side of dash.
• Remove blower resistor screws and blower resistor.

To install, reverse removal procedure
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

Replace the blower resistor that is mounted next to the blower motor on the passenger side of the vehicle.
This will restore correct blower operation and I suspect it is also back-feeding voltage resulting in your electrical issues.
Two screws hold the blower resistor into the heater case and it is very easy to replace.
Good luck

for the fan blower motor it could be the resistor or the fan control speed control switch is bad.for no lights replace the DRL RELAY for the lights. for the heated seats check the fuses.

were these new parts ? from what i know if you have replaced the fan resistor motor and control unit there is nothing elese in the system i would double check it all again

The resister is located under the dash in the passenger footwell area. It is to the driver's side of the blower motor up against the firewall.

To remove, it's easiest to remove the passenger seat to lay down on the car floor. Next, find the blower resistor, remove the connector, remove the one front bolt and just loosen the two bolts by the firewall. Pull the resistor down and out from the two bolts. Installation of the new resistor is the opposite of removal.

Hope this helps