While ac is running, the fan blower comes on for a couple of minutes then stops and there is a humming sound at the blower motor. Is it the blower motor?

Usually a bad start capacitor on the fan motor. It jump starts the motor

The blower motor probably needs very badly to be cleaned, lubricated, or replaced, Michael.

I think you have a "variable speed resistor" problem, it's overheating. It's an electronic device usually located near or attached to the AC motor blower that controls the fan speed. This is a common problem with aging AC blowers with electronic controls.

I assume you are referring to the indoor blower motor. can you here a "hum" from the blower motor as if it is trying to come on and sounds "stuck"? If so, while its humming safely give it a spin (WATCH YOUR HANDS BLOWER WHEEL IS SHARP) . If it takes off and runs you need a capacitor

sounds like you have a bad blower motor their replace the blower motor should do the trick.

Hi,
The blower motor is seized up...you will need to get up top and remove the cover...then remove the fan blades and the motor and replace the motor....sometimes a temp. fix will be to get WD-40 and then oil worked into the bearings...but that is usually a very short lived fix...
Replacing the motor can be frustrating and time consuming, so you may want to hire someone to do it for you...you may also find that a replacement unit is more cost effective..

heatman101

Sounds like the blower motor is junk or has a bad connection. Check the ground on the motor. Does this car have manual controls or Auto temp control.

First check the fuse for the fan. If it makes a humming sound, check if the fan blades have jammed somewhere and being physically stopped, it creates a humming sound.Also check the insulation of fan armature to see if an of the coils have shorted out. Also dont forget to check the condenser/capacitor which initiates the rotation of the fan................sodeep

eventually,cycling process is doing done if the thermostat sense the configure temperayure set up it will trigger to stop your compressor motor as well as the blower fan,blower fan independenly to you compressor.if your thingking that your compressor is tripping off,check your operating current on one line using clamp ammeter and compare to the rated current that tag on
motor compressor body,if the current flow is higher than the rated current specified on compressor motor,well problem occured it will trip your compressor,because overload protector is becoming your thermostat.but if you got same current result it was cycling process.If tripping off maybe air is present in your system call qualified ac tech, to purge out air in system.

Push in on the door safety switch,and use a screwdriver to help start the fan motor, while it calling for fan-on, if it takeoff and run , youll probably need to changeout the fan motor & capicator!