Yep - you're on the right track. Faulty resistor (rheostat) would be my first guess. The switch is probably fine.
The AC blower in your Pontiac Aztek may not be working due to several potential issues, such as a blown fuse, a malfunctioning blower motor, or a faulty blower motor resistor. Additionally, there could be problems with the HVAC control switch or wiring. It's advisable to check the fuses first and then test the blower motor and resistor for proper functionality. If these components are functioning correctly, further diagnosis may be needed.
Good Chance this is caused by a faulty O2 Sensor. I had the engine light stuck on in my 2002 Montana and replaced rear O2 sensor and it turned it off.
The rear wiper on a 1998 Pontiac Montana may not stop due to a faulty wiper relay, a malfunctioning wiper motor, or a short circuit in the wiring. Additionally, a stuck wiper switch can also keep the wiper activated. Inspecting the wiring and testing the relay and motor can help identify the issue. If needed, replacing the faulty component should resolve the problem.
The control switch is probably faulty (or faulty wiring to the switch and/or motor). the resistor unit must be open cicuit that is mounted in the air duct near the blower usually
The Blower resistor should be tested which is located near the blower motor, the resistor is probably faulty.
You probably have a faulty blower motor resistor. I believe it is located on bottom of heater box. This I also believe a dealer item.
Blown fuseA short in the cruise control circuit,Faulty brake or clutch switch,Leaking vacuum circuit,Faulty cruise switch,faulty stepper motor,faulty transducer,faulty speed sensor,faulty cruise control module.That help a little?
Faulty horn switch, faulty horn relay, or a short to power somewhere in the wiring. Power should be constant at the 30 pole of the relay, and should only be present at the 86 pole when the horn switch is depressed.
To repair the fan speed control on a 1998 Nissan Altima, first check the fuse related to the blower motor and replace it if necessary. If the fuse is intact, inspect the blower motor resistor, as a faulty resistor can cause issues with fan speed settings. Remove the glove compartment for access, locate the resistor, and replace it if damaged. Finally, test the fan operation to ensure it works correctly across all speeds.
That is a typical sign that the blower resistor has gone faulty
faulty blower motor resistor
Not sure what you're asking, but dif this is happening all the time, you might have a dual air control system. You can adjust the temp for the passenger and the driver, and the control may be faulty.