Lennox by Mars®, 89M77, Run Capacitor, Dual Capacitance, 440 V, 50/60 Hz, Round

Contractor-Grade Performance – Lennox 89M77 Dual Run Capacitor (40/5 MFD, 440V)

The Lennox 89M77 is an OEM dual run capacitor engineered to meet the demands of high-performance HVAC applications. With its 40/5 microfarad capacitance and 440V rating, this round-style unit provides consistent power to both the compressor and fan motor, ensuring stable and efficient system function.

Designed for Lennox equipment, the 89M77 capacitor offers reliable startup torque and supports continuous motor operation in split-phase HVAC systems. Its rugged construction and precise tolerances make it a dependable solution for field replacements and preventative maintenance schedules.

Advantages for Field Use

• ✅ Dual Functionality: Consolidates compressor and fan motor capacitance into a single enclosure to reduce part count and simplify service.
• ✅ 440V Rated: Withstands higher voltage applications and surge conditions commonly encountered in HVAC circuits.
• ✅ OEM Specification: Matches original equipment values for Lennox systems to preserve design performance.
• ✅ Metal Can Construction: Offers superior thermal conductivity and durability in high-temperature environments.
• ✅ Standard Round Profile: Fits in most control panels with no need for mounting adaptations.

Technical Details

• Capacitance: 40/5 µF (microfarads)
• Voltage Rating: 440 VAC
• Configuration: Dual Run Capacitor
• Shape: Round
• Manufacturer: Lennox by Mars®

Installation Notes

Installation should be performed by a certified HVAC technician. Confirm terminal labels (C, FAN, HERM) and ensure matching voltage and capacitance values before connecting. Use appropriate personal protective equipment and discharge old capacitors before removal. Verify circuit power is de-energized prior to work.

Built for Technicians

For HVAC professionals: The 89M77 delivers the combination of precise ratings, durable build, and compatibility with Lennox systems that contractors rely on for uninterrupted service. Ideal for scheduled replacements and warranty service jobs.

Reliable HVAC Operation Starts Here

Use the Lennox 89M77 Dual Run Capacitor to maintain equipment efficiency, reduce electrical stress on motors, and restore system stability in field repairs. Designed to meet OEM electrical profiles and tested to handle the demands of modern HVAC operation.