Lennox 27K58 Motor

The Lennox 27K58 Motor is a high-efficiency 1/20 HP 115V single-phase motor designed specifically for demanding HVAC applications. Operating at a nominal 1050 RPM, this PSC (Permanent Split Capacitor) motor ensures stable torque and reliable performance for draft induction and blower assemblies. Engineered with a 3.3-inch frame and sleeve bearings, the 27K58 is a direct OEM replacement motor for numerous Lennox and Armstrong Air furnace models. When replacing this unit, verify the CCWLE (Counter Clockwise Lead End) rotation and the 4-mfd 370V capacitor requirements to ensure proper amp draw and thermal protection during high-static operation. The Lennox furnace inducer motor serves as a critical component in maintaining correct flue gas velocity and combustion safety. Proper installation of this 115-volt blower motor reduces cabinet vibration and restores factory-spec airflow, ensuring the system operates within its designed temperature rise parameters without premature mechanical fatigue.

• Direct OEM Fit: Drop-in replacement for Lennox 27K58, ensuring correct bolt patterns and shaft dimensions for rapid field installation.
• Optimized Electrical Specs: Operates on standard 115V 1PH power with low amperage draw to maintain system efficiency.
• Industrial Build Quality: Features internal thermal protection to prevent windings from overheating during continuous duty cycles.
• Reliable Performance: Maintains consistent 1050 RPM output, essential for proper venting and pressure switch engagement in mid-to-high efficiency furnaces.

Common Questions

What are the physical dimensions of the 27K58 motor?
This motor features a standard 3.3-inch diameter frame with a 5/16-inch shaft, typically measuring 2 to 3 inches in length depending on the specific production run for Lennox blower housings.

Can I use a higher horsepower motor as a substitute for the 27K58?
It is critical to match the 1/20 HP rating and 1050 RPM precisely. Using a different horsepower or speed rating can disrupt the pressure switch calibration and lead to system lockout or heat exchanger damage.

Does the 27K58 include the required run capacitor?
This is the motor only. It is best practice to install a new 4 MFD / 370V capacitor during replacement to ensure the motor starts under load and stays within the rated temperature rise.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.