First, let's cover the basics. X13 is a brand name for the Regal Beloit/Genteq brand of constant torque motors; there are other manufacturers that make them, but the term “X13” has become pretty much synonymous with the fractional horsepower HVAC constant torque motor.

Also, this article is specifically discussing the common residential/light commercial motors. There are other types of variable and constant torque motors and equipment not being addressed here.

Both variable speed and X13 motors are ECM or “electronically commutated motors,” which means that the DC power that drives them is electronically switched from positive to negative to spin the motor. Both are more efficient than the typical PSC motor, with ECM motors commonly being about 80% efficient and PSC being about 60%.

Both X13 and variable-speed motors are DC (or alternating DC, if you prefer), three-phase, permanent-magnet rotor motors that use back EMF to determine motor torque and adjust to load conditions.

The primary difference is the type of inputs to the motor control. A variable-speed motor is programmed for a specific piece of equipment to produce a set amount of airflow based on the particular static pressure profile of that system and the inputs from the air handler circuit board or system controller. In other words, a variable speed motor can ramp up down based on the static pressure as well as the staging of the equipment, pin/dip switch or controller settings for desired airflow output, and “comfort profiles” that can be set up to allow the blower to ramp up or down for enhanced dehumidification and comfort.

An X13 motor is programmed to produce a set motor torque based on which input it is receiving 24v. That means that while an X13 motor is more efficient than a PSC motor and does a better job of ramping up to overcome static pressure increase, it does not have the level of control that a variable speed has. It also does not produce an exact airflow output across the full range of static pressure.

That is why when you check the blower charts on a unit with a variable-speed motor, the CFM will remain the same over a wide range of static points, but when you look at an X13 system, the CFM will drop as the static pressure increases.

All of our motors are brushless DC motors that have multi-speed and constant torque. 

It's designed to replace direct-drive blower motors in residential and light commercial furnaces, air handlers, and package systems.

Make sure to remember the following: Each motor is preprogrammed with a 0 to 5 minute delay off. It's important to purchase the exact model number motor you need in order to get the same programming and delay off time. If your new motor doesn't have the same delay on and off as the original, it's likely due to GE updating the program codes to make your system more efficient.

Please remember the following information:

The voltages of 115V, 208-230V, and 120/240V are equivalent to each other. 

120V has a tolerance of +/- 10% by definition. 

240V also has a tolerance of +/- 10% by definition. 

208V is a commercial voltage.

These motors can operate using any of these voltages without requiring any changes to the wiring. 

They are essentially plug-and-play

Sorry, we do not sell any items for geothermal units. Please contact the original manufacturer of your system for these motors.

We understand your preference for motors starting with 5KCP, but unfortunately, we don't sell this type of motor.  

We only sell motors starting with 5SME39.

Our motors are designed with an internal capacitor, eliminating the need for an external one. The capacitor is housed within the module and is not intended to be replaced by the end user.

We do not sell any wiring harnesses for these motors. You will need to use your old wiring, which is a common practice in HVAC repair. Still have questions? Call us at (813) 440-8108during normal business hours.

X13 Motors are activated using active speed tabs. GE has changed the program codes over the years, so the active speed tabs may have changed as well. On the motor we sent you, active speed tabs are indicated by an A over the tab. If you need more information, please refer to our product manual by clicking here: [Product Manual - Click Me]. If you require further assistance, feel free to call us at (813) 440-8108 during normal business hours, and we would be happy to help.

Great news! We provide mail order service, and even though we don't have physical locations near you, all our motors include FREE FEDEX 2-Day Delivery. If you need it even faster, we also offer FEDEX NEXT DAY delivery for a small fee.

We only sell complete ECM blower motors with programmed module and motor. These items are paired and shipped together to ensure they work for the customer. Also, they must remain together to maintain your 2-year warranty.

We are here to provide you with all the necessary technical support! 

Product Manual - Click Me

You have several options to get in touch with us. 

From Monday to Saturday, between 8 AM and 4:30 PM ET, you can call us at (813) 440-8108. 

For any other time, you can email us at customerservice@unitedhvacmotors.com.

We are closed for all Federal Holidays

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