Universal condenser fan motor wiring

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New techs have a common question of how to wire a condensing fan motor for 3 vs. Jesse Grandbois submitted this tech tip to help make it simple. Thanks, Jesse! This one seems to confuse even experienced technicians, but it's actually very simple once you see it. As always, refer to the wiring diagram on the particular motor you are using.

Universal condenser fan motor wiring

This is by far the most common post-transaction question that we receive from customers that have recently purchased replacement condenser fan motors. Simply put, no — you did not buy the wrong condenser fan motor. This guide will explain how to wire your new condenser fan motor using a four wire setup or a three wire setup when using a single run capacitor or a dual run capacitor. If you recall from our residential cooling season guide , outdoor condenser units use a switch called a contactor. This switch is controlled by the thermostat and closes to complete an electrical circuit when electricity needs to be supplied to your condenser fan motor and compressor. Think of the contactor almost as a gatekeeper — two legs of volt electric supply need to flow through it in order for your system to function properly. Condenser units also use a component called a run capacitor. Dual run capacitors are used for both your condenser fan motor and your compressor. Single run capacitors are used exclusively for just your condenser fan motor or just your compressor. Like your contactor, your capacitor needs to be wired correctly in order for it to function properly. This will likely be back to your contactor.

The wiring diagram said to hook it up to the common lead on the capacitor.

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New techs have a common question of how to wire a condensing fan motor for 3 vs. Jesse Grandbois submitted this tech tip to help make it simple. Thanks, Jesse! This one seems to confuse even experienced technicians, but it's actually very simple once you see it. As always, refer to the wiring diagram on the particular motor you are using. As you can see, the only difference is that there is no jumper from the contactor to the capacitor. They're joined inside the motor. The brown wire with the white stripe is only there for convenience. You will find that it either reads zero or very low ohms, proving that they are directly connected within the motor.

Universal condenser fan motor wiring

Service calls about condensing fan motor failure are quite common. Even though fan motor replacement is a standard procedure for residential split systems, it requires careful attention to safety and detail. This article will give you a step-by-step guide to replacing condensing fan motors. Along the way, we will also explain a few best practices for safety and an enhanced understanding of the process. One of the reasons why motor failure is so common is because there are many ways that it can fail. Some causes may include failing shorted, windings failing open, and bearing failure. The image above shows highlighted bearings, which often fail due to improper lubrication or environmental contamination. There are a few other conditions that can cause a motor not to run. For example, wiring problems and failed capacitors are other issues that may cause the motor to stop running.

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Did you feel the motor, is it hot? So I did. To leave a comment, you need to log in. This is by far the most common post-transaction question that we receive from customers that have recently purchased replacement condenser fan motors. Condenser units also use a component called a run capacitor. The brown lead with the white tracer will not be used for this setup. If you answer yes, be prepared to show documentation. Please enter a password for your user account. How do I wire a ydk14 -4 using a separate capacitor on a evaporator Reply. Use your multimeter to confirm the disconnection.

This is by far the most common post-transaction question that we receive from customers that have recently purchased replacement condenser fan motors. Simply put, no — you did not buy the wrong condenser fan motor.

Then about 5 minute or so motor came on the stopped then came on again. Usually choose the 4 wire method and have always trained guys that way. The York tech service guy came out on site and problem is still the same after he was looking at it. What does Note 4 say? Again, this is AC power and not a dual capacitor, so the terminal side does not matter. Also, do the next guy a favor, and remove all the old unused wiring and capacitors. This is great! Leave a Reply Want to join the discussion? Errors The following errors occurred with your submission. This will likely be back to your contactor. As always, refer to the wiring diagram on the particular motor you are using. Register Now. With that one lag of power being Yellow Black would be your common lag. If you're using a rescue motor, forget about the original diagram, and simply use the rescue wiring diagram.