Lennox by Mars®, 89M74, Run Capacitor, Dual Capacitance, 440 V, 50/60 Hz, Round

HVAC-Grade Reliability – Lennox 89M74 Dual Run Capacitor (35/5 MFD, 440V)

The Lennox 89M74 is an OEM-rated dual run capacitor engineered for Lennox HVAC systems requiring 35/5 microfarads at 440 VAC. Designed to simultaneously support the compressor (HERM) and condenser fan motor (FAN), this round-style capacitor offers dependable electrical performance for continuous-duty air conditioning applications.

Constructed to meet manufacturer specifications, this unit is ideal for direct replacement in Lennox equipment or equivalent systems with matching electrical characteristics. It is well-suited for use in residential or light commercial split systems where dual motor operation and compact component dimensions are required.

Product Features

• ✅ Dual Run Configuration: Combines two capacitors into a single cylindrical package—simplifies wiring and reduces panel space.
• ✅ 440V Rating: Suitable for high-voltage systems with greater tolerance to transient surges and heat conditions.
• ✅ OEM-Level Compatibility: Matches electrical parameters specified by Lennox for optimized motor performance and system protection.
• ✅ Dielectric Aluminum Can: Sealed round metal case designed to withstand temperature fluctuation and moisture exposure in HVAC environments.
• ✅ Standard Terminal Layout: Includes common C, HERM, and FAN labeled quick-connect terminals for universal installation across compliant units.

Specifications

• Model: 89M74
• Capacitance: 35/5 µF
• Voltage: 440 VAC
• Type: Round Dual Run Capacitor
• Application: Designed for Lennox air conditioning systems

Installation Guidance

This capacitor should be installed by a certified HVAC technician. Ensure that power is fully disconnected before handling electrical components. Match terminal designations to existing wiring, and verify secure connections using proper insulated tools. Always confirm capacitance and voltage ratings before commissioning the system.

For Contractors

Service Technicians: The Lennox 89M74 is a direct-fit solution for field capacitor failures, stocked for service vans and preventive maintenance kits. Its durable enclosure and verified ratings support long-term operation under cycling HVAC loads.

System Installers: Ideal for final-stage commissioning in Lennox condenser units requiring dual support for compressor and condenser fan. Keeps installations within OEM compliance and avoids mismatched replacements.

Performance-Oriented Design

• ✅ Dual Motor Load Support
• ✅ Compact Round Profile
• ✅ Tested to HVAC Industry Standards
• ✅ Backed by OEM Specification Data

Optimize System Stability with Precision Components

The Lennox 89M74 Dual Run Capacitor offers the reliability and electrical conformity required for precision HVAC work. Engineered to meet Lennox OEM tolerances and designed for harsh-duty cycles, it ensures your installations and service repairs meet long-term performance expectations.