Universal condenser fan motor wiring

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.

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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.

You can use a wire nut and electrical tape to tie it off. Set the motor rotation to match the fan blade.

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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.

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.

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Connect the L1 and the L2 wires from the motor to the load side of the contactor - this is where the wires To the compressor are connected. Great information Reply. Connect both brown wires from the motor to the correct size capacitor. The wiring diagram said to hook it up to the common lead on the capacitor. A Common Sense Look at Temperature Conversions Before we convert temperature scales, let's take a step back and think about what temperature is in the first place. Condenser units also use a component called a run capacitor. Thanks, Kevin! Well written! Then about 5 minute or so motor came on the stopped then came on again. This is on the original motor. I tried twice to understand what you did or didn't do. They're joined inside the motor. Email Address: Please enter a valid email address for yourself. Attached Images.

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.

Email Name Website. Also power feeding one cap and 3 wires on each terminal that could be wire nutted if you choose. Condenser fan motor replacement Sounds simple as we all have done 's. Olivia — Thank you very much for your comment. Originally Posted by VTP Thank you very much for your comment. I tried twice to understand what you did or didn't do. They are NOT the same as compressors where the listed amps are 18 and it pulls 12 , No , Not at all , when a fan says it pulls 3. A Common Sense Look at Temperature Conversions Before we convert temperature scales, let's take a step back and think about what temperature is in the first place. Page 1 of 3 1 2 3 Last Jump to page:.