Lennox 89M85 Run Capacitor

The Lennox 89M85 is a high-grade OEM 60/7.5 MFD 440V Round Dual Run Capacitor engineered for heavy-duty HVACR applications. Designed to handle the high-torque demands of Lennox air conditioner and heat pump units, this dual-run component facilitates the precise phase shift required to start and maintain both the compressor and the condenser fan motor. Constructed with a 440 VAC rating, it provides superior overhead for 370V systems, ensuring reliable dielectric strength under extreme thermal loads. As a veteran technician knows, the dual run capacitor 60/7.5 configuration is critical for maintaining correct microfarad (MFD) tolerances to protect motor windings from overheating. The 89M85 replaces the 89M8501 and 100335-17, featuring a robust round aluminum casing that fits standard mounting straps. This HVAC capacitor replacement is essential for resolving internal shorts, "hard starting" issues, or swollen capacitor housings that disrupt system efficiency. By ensuring consistent voltage regulation, this genuine Lennox replacement part optimizes the performance and longevity of single-phase motors in high-demand environments.

• Dual-Section Design: Simultaneously supports the compressor (60 MFD) and fan motor (7.5 MFD) using a common terminal for streamlined wiring.
• Extended Voltage Tolerance: Rated at 440V to provide a safer operational margin compared to 370V alternatives.
• Direct OEM Compatibility: Precise mechanical fit for Lennox 89M85 applications, eliminating the need for mounting bracket modifications.
• Industrial Build Quality: Built for continuous duty cycles in 50/60Hz systems, ensuring stable motor torque across varying ambient temperatures.

Can I use the Lennox 89M85 to replace a 370V capacitor?
Yes. You can always increase the voltage rating of a capacitor (e.g., using a 440V unit for a 370V application), but you must never decrease it. The 60/7.5 MFD rating must remain exact.

What are the signs of a failing 89M85 capacitor?
Look for a bulging top, oil leakage, or a "humming" sound from the condenser without rotation. Use a multimeter to verify the microfarad output between the 'C' and 'Herm' or 'Fan' terminals.

Is the 89M8501 the same as the 89M85?
Yes, the 89M8501 is a common part number variant used in factory documentation. They are technically identical round run capacitors.

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.