This heavy-duty regulator spring is essential for technicians performing routine HVACR maintenance or field repairs to ensure precise outlet pressure settings within specified tolerances

inspect the media every 6 months

Durable Pneumatic Actuation: The normally open spring return 823D00 actuator ensures fail-safe operation in the event of air pressure loss

ensuring easy field retrofits

This HVAC part is specifically optimized for use with Hoffman Controls 744 Series

Lennox 10M75 Limit Switch 320788-703 This heavy-duty regulator spring isThe Lennox 10M75 Limit Switch is a critical safety component designed for high limit thermal protection in Lennox HVAC systems. Engineered as a genuine OEM replacement part, this L210 40F limit switch operates on a snap disc thermal response mechanism to monitor heat exchanger temperatures. It is calibrated to open the circuit at 210F and automatically reset when temperatures drop by a 40F differential (resetting at 170F). This auto reset furnace