Lennox 15C83 (Lennox 100087-17) is an OEM low pressure switch designed to protect HVAC and refrigeration systems by monitoring system pressure and interrupting operation when unsafe low-pressure conditions occur. This switch actuates at 90 PSI and automatically resets at 40 PSI, helping prevent compressor damage, refrigerant loss issues, and system inefficiencies caused by low suction pressure.

Built to Lennox factory specifications, this low pressure switch ensures reliable performance, accurate pressure response, and long service life in both residential and light commercial HVAC applications. It is commonly used in Lennox air conditioning and heat pump systems where precise pressure control and system protection are required.

 

The Lennox 15C83 low pressure switch provides automatic system shutdown when pressure drops below safe operating levels. Once pressure returns to normal range, the switch resets and allows the system to resume operation without manual intervention.

 

Key features

• OEM Lennox replacement part
• Actuates at 90 PSI for reliable low-pressure protection
• Resets automatically at 40 PSI
• Helps prevent compressor damage and refrigerant-related failures
• Designed for dependable operation in demanding HVAC environments
• Direct-fit replacement with no modifications required

 

Specifications

• Manufacturer: Lennox
• Part number: 15C83
• Lennox catalog number: 100087-17
• Switch type: Low pressure switch
• Cut-out (actuation): 90 PSI
• Reset pressure: 40 PSI
• Application: HVAC air conditioning and heat pump systems
• OEM: Yes

 

This Lennox low pressure switch is ideal for technicians and contractors performing repairs or maintenance who require precise pressure control and OEM reliability. Using genuine Lennox parts helps maintain system performance, safety, and manufacturer compliance.