Condenser Fan Motors

Condenser fan motor replacement is another easy do it yourself repair. Bearing failures are usually the reason the fan motor needs changed.

Always replace the capacitor when changing the motor. The capacitor is usually a dual type that services the motor and the compressor. When bearings start to fail the motor windings heat up. This heat is also generated in the capacitor and can cause damage to the capacitor. A damaged capacitor can cause failure of the new motor or the compressor which will be a very expensive repair. Capacitors are not expensive items and sometimes saving a small amount of money will lead to spending a large amount of money.

Before attempting any repairs make sure the power is shut off. Verify with an electrical meter. Mark the location where the wires terminate paying close attention to wire color. If you have ordered the new motor from Shortys HVAC Supplies the wiring will be exactly the same in most cases. Remove the wiring after marking and remove the cover with the fan motor attached. Turn it upside down and spray the shaft with penetrating oil. Do not tap on the shaft with a hammer or punch. Remove the locking screw in the collar of the fan blade. If there is any rust on the shaft beyond the fan blade sand this down to shiny metal so the blade will pull off easily. Reach between the blade and motor with pliers and hold the shaft. Gently twist the fan blade from side to side to get it to spin on the motor shaft. As it starts to spin gently pull the blade away from the motor. In most cases it will come off with no damage if you are patient. If not you can order a new blade as well. After the blade is off turn the assembly back over and remove the three or four locknuts holding the motor to the shroud.

Reassemble in the reverse order. We recommend greasing the motor shaft before installing the new blade to make it easier for removal if the motor fails again. Be sure and tighten the fan hub locking screw on the flat spot of the motor shaft. This flat spot is specifically machined on the shaft for this reason. If you tighten the screw down on the round part of the shaft it may slip. It will also be very difficult to remove later.

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