I sell GM parts so I know this is a very common problem. The blower resistor is located behind the glove box inside the dash. It is beside the blower motor, and the part # you need is 89018643. It lists for $38.65, (the reason I add that is because I know many GM dealers sell parts for more than the GM suggested retail price), and should be readily available from any Buick dealer. You could probably replace it yourself, it wouldn't be too difficult, however there isn't a lot of room under the dash. I have sold many to retail customers that have put them in themselves.
You need to replace blower motor resistor.
the contour has problems with the blower motor switch and the resistor. I would check the resistor connector for signs of melting.
The old resistor was burned out. If you burn out the new one again, replace the blower motor.
if you mean highest setting being the fan speed, then the problem is most likely the fan speed resistor located in the blower motor box area
Most likely the heater motor resistor has failed
The blower motor speed resistor is burned out. You can replace only the resistor but the resistor probably burned out because the blower motor is going bad. If you want to fix it for good, replace both the blower motor and blower motor speed resistor.
Typically a relay or resistor. But could be a blower switch or blower motor problem.
Voltmeter connect in parallel with the circuit setting on voltmeter highest range first then to lower range. Ohmmeter we need to use the ohmmeter meter setting connect across the resistor
Probably bad resistor pack on blower motor
Highest setting on the meter.Highest setting on the meter.
sounds like the resistor board has blown, on the highest setting it has no resistors, hence the reason it still works
If you are referring to the blower motor speed, and only the highest setting works, then the problem is a bad Blower Motor Resistor Pack.