Lennox 97W21 (Lennox 103637-01) is an OEM high pressure switch designed to protect air conditioning and heat pump systems from excessive refrigerant pressure. This safety control monitors system pressure and opens the circuit at 550 PSI, automatically resetting once pressure drops to 400 PSI. By preventing operation under unsafe conditions, it helps reduce the risk of compressor damage and costly system failures.

Manufactured to Lennox OEM specifications, this high pressure switch ensures accurate pressure sensing, dependable performance, and proper system protection. It is commonly used in Lennox residential and light commercial HVAC equipment where precise high-pressure control is required. Ideal for professional HVAC technicians performing repairs or preventative maintenance.

Key features:

• OEM Lennox replacement high pressure switch
• Cut-out (actuation) pressure: 550 PSI
• Automatic reset at 400 PSI
• Protects compressors and refrigeration components
• Designed for reliable, long-term HVAC operation

Applications:

• Lennox air conditioning systems
• Lennox heat pump systems
• HVAC systems requiring high-pressure safety protection

Specifications:

• Brand: Lennox
• Lennox part number: 97W21
• Manufacturer part number: 103637-01
• Switch type: High pressure safety switch
• Cut-out pressure: 550 PSI
• Reset pressure: 400 PSI
• Function: High refrigerant pressure protection

Why buy from Beenimax:

Beenimax supplies only genuine OEM HVAC replacement parts to ensure correct fit, safe operation, and long service life. Our experienced support team helps contractors and homeowners get the right part the first time, minimizing downtime and avoiding compatibility issues.

Replace a faulty or damaged pressure switch with Lennox 97W21 to restore proper system protection and keep your HVAC equipment operating safely and efficiently.