Description
Lennox 89M90 Dual Run Capacitor Overview
The Lennox 89M90 is a 70/10 microfarad (MFD), 370VAC round dual run capacitor engineered to deliver dependable starting and running performance for both the compressor and the condenser fan motor in a single compact component. By combining two capacitance values into one round housing, this dual run capacitor simplifies installation, reduces parts count, and saves valuable space inside the unit cabinet.
Key Specifications
- Capacitance: 70/10 Microfarad (MFD/µF)
- Voltage Rating: 370VAC
- Configuration: Dual run (compressor + fan motor)
- Shape: Round
- OEM Part Number: 89M90
- Brand: Lennox
Features & Benefits
- Dual capacitance in a single round housing — powers both the compressor and condenser fan motor simultaneously
- 370VAC rating provides a reliable safety margin for standard residential and light commercial HVAC systems
- Round form factor fits most standard capacitor brackets and mounting hardware
- Genuine Lennox OEM replacement part ensures proper fit and compatibility with Lennox equipment
- Helps maintain motor efficiency, reduce energy consumption, and extend equipment service life
- Drop-in replacement minimizes downtime during service calls
Application
The Lennox 89M90 is designed as a direct OEM replacement capacitor for compatible Lennox air conditioning and heat pump systems. Dual run capacitors are a critical electrical component — they store and release the energy needed to start and keep both the compressor and condenser fan motor running smoothly. Replacing a failed or weak capacitor promptly restores system efficiency and prevents compressor damage.
Installation Notes
- Always discharge the capacitor before handling — capacitors can retain a dangerous charge even after power is disconnected
- Match capacitance (MFD) and voltage ratings exactly to the original component
- Consult the unit’s wiring diagram for correct terminal connections (HERM, FAN, COM)
- Recommended for installation by a qualified HVAC technician
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