Lennox 10J42 Hard Start Kit

Hard Start Kit

10J42 is identical to 10J4201

Lennox 10J42 Hard Start Kit – Genuine OEM HVAC Component

Boost the performance and reliability of your air conditioning system with the Lennox 10J42 Hard Start Kit. This official OEM replacement part is designed specifically for Lennox HVAC units, helping your compressor start more smoothly and efficiently—especially under heavy load or low-voltage conditions.

Engineered to deliver reliable startup assistance, the 10J42 Hard Start Kit reduces strain on your compressor, extends equipment life, and helps improve overall cooling performance. Whether you're replacing a worn component or upgrading your system, this kit ensures optimal compatibility and dependable operation.

Key Features:

• Genuine Lennox OEM Part – Ensures perfect fit and performance

• Improves Compressor Startup – Ideal for systems experiencing hard starts

• Enhances Efficiency – Helps reduce energy draw during startup cycles

• Extends Compressor Life – Reduces wear and stress on system components

• Easy, Direct Replacement – Designed for Lennox HVAC equipment

Specifications:

• Product Type: Hard Start Kit

• Part Number: 10J42

• Compatibility: Select Lennox HVAC systems (OEM-specific)

Upgrade your unit’s reliability and performance with the Lennox 10J42 Hard Start Kit—a trusted solution for smoother startups and long-lasting system health.