ac and heat only work on lowest setting

[whompinxj]

checked the fuses - good
blower motor only blows at the lowest setting. winter is coming soon and im gonna be bundled up like an eskimo in my jeep. HELP!

[old_man]

If it only works on the lowest setting, it is most likely the switch. There is a blower motor resistor used to slow the motor for various speeds, but if it is bad, you will only have the high setting. Pull the dash facia and make sure the connector is on the back of the heater control. Otherwise, you most likely have a bad
switch.