Engine overheating or cooling fan running all the time.
engine cooling fan should not do this - bad temp sensor likely
check the cooling fan sensor somewhere attached of the fan housing.
No. The thermostat would maintain constant temp.
Sounds like the thermal switch needs replacing.
There is a good possibility the relay is stuck.
A. you are probably out of Refridgerant in your AC B. you probably have a leak in your AC compressor and lost all of your refridgerant
If it runs even with the car shut off it is probably a bad switch. If it runs all the time with the engine running it is probably a bad temp sensor.
unplug the temp sensor under the thermostat housing ,
Why does the temperature gauge on your 2001 malibu not work and the cooling fans run all the time?
On a 10 year old car it is time for a complete cooling system service. Drain and flush, replace the thermostat, inspect and replace as necessary all hoses. Also replace the thermal switch for the cooling fans.
The 1991 Toyota Corolla cooling fan will stay on all the time if the temperature sensor is malfunctioning. Replace the temperature sensor.