Product Description
Lennox 12J90 – Lennox LB-31200BN Start Assembly Kit is a complete hard start solution designed to improve compressor starting performance in residential and light commercial HVAC systems. This kit includes a start capacitor, potential relay, and mounting bracket, providing all required components in one convenient assembly for reliable installation and long-term operation.
The Lennox LB-31200BN start assembly kit is engineered to reduce starting torque strain on compressors, especially in systems experiencing hard starts due to age, low voltage conditions, long line sets, or high load demands. By delivering an additional boost of starting power, this kit helps extend compressor life, improve system reliability, and reduce nuisance start failures.
Manufactured to Lennox quality standards, the 12J90 start assembly kit is compatible with a wide range of Lennox air conditioning and heat pump systems and is suitable for both replacement and retrofit applications. The included mounting bracket allows for secure installation inside the electrical compartment, ensuring proper component positioning and vibration resistance.
This start assembly kit is commonly used by HVAC technicians as a dependable solution for improving compressor start-up performance while maintaining manufacturer-approved system operation.
Product Overview
The Lennox 12J90 start assembly kit provides enhanced compressor starting assistance by combining a start capacitor and potential relay into a single, easy-to-install assembly. It is designed to support consistent compressor operation under demanding conditions and is ideal for service replacements or system performance upgrades.
Specifications
Manufacturer: Lennox Approved
Part Number: 12J90
Kit Number: LB-31200BN
Kit Components: Start capacitor, potential relay, mounting bracket
Function: Compressor hard start assistance
Application: Air conditioning and heat pump systems
Installation Type: Internal electrical compartment mounting
Compatibility: Select Lennox HVAC systems
Applications
Residential air conditioning systems
Residential heat pump systems
Light commercial HVAC equipment
Hard-start compressor conditions
Service replacement and retrofit installations
This Lennox 12J90 start assembly kit is a reliable choice for maintaining proper compressor operation, improving start-up efficiency, and supporting long-term HVAC system performance.