Lennox by Mars®, 89M83, Run Capacitor, Dual Capacitance, 440 V, 50/60 Hz, Round

Contractor-Grade Component – Lennox 89M83 Dual Run Capacitor (45/10 MFD, 440V)

The Lennox 89M83 is an OEM-specified dual run capacitor designed to support both compressor and condenser fan motor operation in split-phase HVAC systems. Rated at 45/10 microfarads with a 440V tolerance, this round-style aluminum electrolytic capacitor ensures reliable startup and continuous motor performance in demanding cooling environments.

Engineered for integration into Lennox units and compatible with equivalent electrical profiles across many commercial and residential systems, the 89M83 helps maintain optimal power factor and reduces motor cycling stress. It meets application standards for permanent split capacitor (PSC) motor loads under high thermal and electrical duty conditions.

Primary Attributes

• ✅ Dual Motor Support: Combines fan and compressor capacitance into one enclosure for efficient power delivery and simpler panel wiring.
• ✅ 440 VAC Rating: Supports installations subject to voltage surges and ambient heat near outdoor condenser coils or rooftop systems.
• ✅ OEM Electrical Match: Ensures direct compatibility with Lennox cooling products using 45/10 µF values for both motors.
• ✅ Round Aluminum Canister: Metal case design with insulating top for durability and secure terminal connections.
• ✅ Standard Terminal Layout: Three-prong C-HERM-FAN orientation supports universal quick-connect replacements.

Specification Summary

• Model: 89M83
• Capacitance: 45/10 microfarads (µF)
• Voltage Rating: 440 VAC
• Form Factor: Round dual run capacitor
• Application: Compressor and fan motor circuits in Lennox air conditioning systems

Installation Guidelines

Installations must be performed with power fully disconnected. Match terminal designations carefully (C, FAN, HERM), and inspect all spade terminals for secure fit. Dielectric discharge of the old unit is recommended using a resistor-rated tool prior to handling. Confirm new capacitor values with a multimeter before energizing system circuits.

Contractor Use Cases

For Installers and Field Techs: The Lennox 89M83 is a direct-replacement solution for Lennox OEM configurations using 45/10 µF capacitors. Commonly stocked for compressor and fan motor service calls, it’s designed to reduce downtime and restore full cooling capacity quickly.

For Service Organizations: Ensures system performance remains within factory specification limits. Ideal for preventative maintenance plans, particularly on systems operating in high ambient conditions requiring 440V-rated parts.

System Performance Advantages

• ✅ Extended Motor Life: Maintains torque efficiency and reduces current draw at startup.
• ✅ High Ambient Durability: Built to perform in harsh field environments.
• ✅ OEM Assurance: Manufactured to Lennox part standards for service continuity.
• ✅ Universal Application: Applicable in any HVAC unit matching capacitance and voltage ratings.

Reliable Power Conditioning for Motor Loads

The Lennox 89M83 Dual Run Capacitor offers critical power regulation for motors operating in HVAC systems exposed to thermal cycling, variable loading, and voltage transients. Specified by Lennox and validated for robust field performance, this component is an essential service item for restoring motor function and preserving compressor health.