Fan won't run / won't cool

The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.

slide out and spin blade by hand. should be able to tell if anything restricting rotation

Is everything dry? Do you hear any noises like the compressor running it is just not cooling?

It sounds like the run capacitor(silver can in control box) has failed if your comfortable around electrical you can change it; just replace it with the same rating as your other one. Make sure the power is off and write down it rating (i.e. 35+5 370 or 440 volts for a dual or 35 370 or 440 volts for a single).

maybe it has tripped off on high pressure, as you have have said the fan is not turning so will cause high pressure. now assuming the problem is the fan is not running than check the condition of the condensator /capacitor for the fan motor. if the motors winding is still good replace the capacitor and try it ON.

It sounds like the unit may be over charged. Make sure the outside coils are clean and you have plenty of airflow coming out of the top of the outside unit. What could be happening is, when the temps get higher outside, so do the pressures in the system. The compressor has a thermal overload protection that will kick the compressor off if it gets to hot, which if the compressor is over charged, it will work twice as hard, over heat and shut off. You would need a technician to come out and get the refrigerant charge back to normal. Another thing that could be happening is a weak or faulty capacitor, which is a small round or oval metal object, found in the electrical compartment on the unit. This are fairly simple to change out if your comfortable with electric. I've also had to put what's called a hard start kit on compressors with the same problem, new and old. The hard start basically gives it that extra boost of power to get it up and going. I would start with the refrigerant charge and go from there. The electrical "humming" sound that you hear unless you turn the breaker to the furnace off, is the contactor on the outside unit having a call for cooling. The 24 volts come from the furnace, to the outside unit, and pulls the contactor in to power the unit with the 220 volts supplied. It is normal and you don't have to worry about that at all. I hope some of this helps and good luck!

Its possible that the contactor that closes to start the outdoor unit is not pulling in and passing power. You are hearing the coil humming since it is getting control power. Also first check that breaker for outdoor unit is not tripped

It sounds like your unit is low on freon or the compressor is not kicking in. If the compressor kicks in you can hear it turn the unit on fan only or turn the thermostat off then turn the unit to demand cool you should hear a hum even vibration when the unit kicks in. If there is no audible hum ect... your compressor is probably not kicking in. The selector switch the temp switch the capacitor for the compressor or the compressor its self could be bad. good luck if you need to know how to test any of the above let us know

If blower not working, and yoou hear a slight "Hum" with fan only on, try this. With power off to AC. Go up on roof, and slide a stick through opening on side near rear, and try to get to fan blades at rear of unit. try to spin the blades a few times, even if it only goes a little at a time. Unless you want to take all those screws out & remove cover to get at it better, but watch for wasps under there. Give fan a couple of full rotations, then have someone turn it on to fan only & see what happens. If fan finally works, let it run for a few minutes on fan, then try cool & see if it all comes together again. Let me know.

You hear the compressor kick in (Hum) but no fan comes on? Will the fan come on when just in fan mode, not cool, or do you have that set-up?