Lochinvar 100093809 Door Safety Switch for Knight Boilers

The Lochinvar 100093809 is a genuine OEM door safety switch designed for specific Knight series boilers. This critical safety component ensures the boiler operates only when the access door is properly closed and secured, preventing unsafe operation and maintaining system integrity.

Key Features:

• Genuine Lochinvar OEM replacement part
• Door-mounted safety interlock switch
• Ensures safe boiler operation by monitoring door closure
• Designed for natural gas configurations
• Direct replacement for worn or failed door switches

Compatible Models:

• Knight 40S40 series boilers
• Knight 50T50 series boilers

This door switch is an essential safety device that prevents the boiler from firing when the access panel is open, protecting service technicians and ensuring compliance with safety standards. When the original switch fails, the boiler may not operate or may display error codes indicating a door switch malfunction.