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 brown lead with the white tracer will not be used for this setup. You can use a wire nut and electrical tape to tie it off. Using a single run capacitor with a three wire setup:.

Remember Me? They're joined inside the motor. Sound like someone didn't have the correct capacitor once upon a time and paralleled two to make one.

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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.

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. 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.

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Olivia — Thank you very much for your comment. Cancel Changes. Reason: when your dual run capacitor eventually gives out and you go to the store only to find they dont have any dual run caps available in your size but they do have two single caps to get you going again. Now, for your 4-wire method: White wire from the condenser fan motor to one side of power on the contactor T1. Whether a 4 wire or 3 wire, it is not that complicated. 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. Jesse Grandbois submitted this tech tip to help make it simple. A little tip when changing liquid cores: If you start pumping them down, begin bypassing discharge gas into the shell to warm it up, push out the remaining liquid, and bring the shell above the dew point so that it doesn't sweat […]. This will likely be back to your contactor. The end. Remember Me? Quick Reply. How many fans are on this?

This is by far the most common post-transaction question that we receive from customers that have recently purchased replacement condenser fan motors.

Do I remove it or is it safe to leave it. 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. Im thinking with jumper wire to cap in the unit with power going to one terminal on the cap would work rather than diagram with motor. Thanks for posting! I did not use the wire back from the original capacitor. So I did. In control panel there is two caps one brown on and a jumper from one cap to cap. I will need to ohm for white to brown and stripped brown as well as black wire from the new Motor to find the least resistance if I do install the way the original was installed. Thanks, Jesse! Again, this is AC power and not a dual capacitor, so the terminal side does not matter.