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The best way to Replace The Fan Motor On An AC Condenser
An air conditioner’s condenser fan motor keeps the compressor from overheating and cools super-heated refrigerant as it flows through the condensing coil. When considering replacing a foul touch dimmer schaltung AC condenser fan motor, always remember that the replacement motor should have identical speed and horsepower ratings. Universal replacement motors have multiple speed settings. Many technicians replace the fan’s capacitor when changing a fan motor. Yearly fan maintenance, a drop of oil, can increase the life of an air conditioner’s condenser fan motor considerably.
Things You may Need
Nut driver set
Disconnect the electricity to the condensing unit at either a disconnect box located near the condensing unit or within the circuit breaker box. Disconnect boxes mount on the house near the condensing unit and use either a removable bus-bar or a switch that looks like a circuit breaker. The label for the correct circuit breaker, within the circuit breaker box, should read either “air conditioner” or “heat pump.”
Unscrew the control panel’s access cover with the proper-size nut driver, usually 1/4- or 5/16-inch. Following the wire’s conduit from the disconnect box, or where it exits the house, will result in the control panel. Place the screws in a safe place.
Pull down on the access cover to release it from the highest lip of the condensing unit’s lid.
Place the leads from a voltmeter on the contactor’s wire terminals. The thick high-voltage wires that enter the control panel hook up with the contactor. The meter must read zero.
Unscrew the condensing unit’s fan shroud with the proper-size nut driver, usually 1/4-, 5/16-, or 3/8-inch. Some models require removing the whole lid, while some only need the grille on top removed. Lift the lid to access the fan motor.
Cut the motor’s wires contained in the fan compartment with wire cutters.
Disconnect the fan motor from its mounting bracket. Typically the motor screws directly to the mounting bracket, either through the highest of the motor or through the side of the motor’s case. Use a nut driver to remove these screws. Some models use a belly-band to hold the motor in place, which will require an adjustable wrench to loosen.
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Loosen the fan blade mounting screw, located near the middle of the blade, with an adjustable wrench. Pull the blade off the fan motor’s shaft. A drop of oil placed on a rusty shaft will aid in removal.
Use the tag on the old motor to identify which color wires go to the capacitor, common and hot. Write this information with a pencil on a bit of paper. Do the identical thing with the brand new motor. Universal replacement motors may have several different speed settings, using different colored wires. Compare the speed of the old motor with the tag on the new motor to search out the correct color wire that corresponds with the right speed.
Slide the fan blade onto the brand new motor’s shaft. The blade’s mounting screw must face away from the fan housing. Tighten the mounting screw with an adjustable wrench. Spin the blade to verify it doesn’t touch any a part of the motor.
Mount the brand new motor and blade to the condensing unit’s fan mounting bracket. Use the new screws that include the fan motor, if included, otherwise reuse the old mounting screws. If the unit uses a belly-band, slide the wires over the belly-band, push the fan into place and tighten the belly-band.
Pull the old wires into the control panel. Leave them connected for reference.
Push the brand new wires into the control panel.
Connect each new wire to its proper terminal, using the written information on the paper as a guide. Remove one old wire from its terminal at a time. Before moving to the following wire, connect the correct wire from the brand new motor to the terminal. One wire will go to every side of the contactor and, depending on the model, one or two wires will go to a capacitor. All extra fan-speed wires need wire nuts twisted on to protect them from shorting contained in the control panel.
Screw the fan’s shroud to the condensing unit and screw the access panel’s cover into place.
Turn the ability to the condensing unit on and test the fan.
Tips & Warnings
Recycle the old fan motor. Scrap yards can pay money for it.
Furnace Compare: Condenser Fan
HVAC for Beginners: Air Conditioner Fan Replacement
HVAC Oracle: Condenser Fan Motors
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