38CKC036 Air Conditioner: outside fan will not come on makes a humming noise...

Yes,the fan motor is about to seize up. Replace the fan motor.

you may have fuses in the disconnect box by the unit, check the fuses if existing. Some disconnect boxes have a cover to remove to get to the fuses

Hi,

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

Air Conditioner Trouble - Review the Possibilities

heatman101

Hi,
Either the condenser fan is not working and it has shut down on high pressure... or the compressor is locked up and trying to run and is making the heat...

Here is a tip about trouble shooting your air conditioner...

Air Conditioner Trouble -Review the Possibilities
http://www.fixya.com/support/r3571569-air_conditioner_trouble_review_the_possi

heatman101

Hi,
If the fan is humming and not running them it has gone bad....it will need to be replaced...not all that difficult a job...most pro's do it in less then an hour...

Here is a tip about trouble shooting your air conditioner...

Air Conditioner Trouble -Review the Possibilities
http://www.fixya.com/support/r3571569-air_conditioner_trouble_review_the_possi

heatman101

Check the filter and change if dirty or restricted. Make sure the blower access panel is secured. Make sure the cooling coil is clean on the top (outside) and on the bottom (inside).

Fan motor is dry or going bad try to lubricate it and see if that frees it up. If not you will need to get a new fan motor.

Is it humming like a stuck motor or rattling, like a loose fan. If it's rattling, the fan could eith be loose on the motor or, the center hub could have broken loose.

No power to outside unit. Check to see if contactor on outside unit is pulled in. Most AC units inside have float switch. When the drain stops up it shuts off outside unit. Located in overflow or underneath unit. No Problem Rusty

If the humming noise is coming from the attic it would indicate that the blower motor on the air handler is trying to start but the rotor is locked.

If the humming noise is coming from the outside unit and the fan runs but the compressor does not your compressor has a locked rotor.

If the blower motor is the problem the outside unit should still start as normal but you would have no cooling due to no air movement.

In ether case it sounds like you need to call a service tech to diagnose your system.