Reznor 57953 Limit Switch This HVAC gas orifice is

This HVAC gas orifice is a direct OEM replacement part

Built with reinforced thermoplastic

meeting the NFPA 72 requirement for sampling tubes to extend across at least 2/3 of the duct width for reliable smoke detection

the 90-382 is built for continuous duty in residential and light commercial settings

Key Benefits for Technicians Precise Pressure Control: Enables a stable 5-12" WC pressure range for varied gas regulator settings

Reznor 57953 Limit Switch This HVAC gas orifice isEnsure your commercial heating units operate within safe thermal parameters with the Reznor 57953 Limit Switch. This L170 40F limit control is a precision engineered OEM replacement part designed to monitor discharge air temperatures and prevent heat exchanger damage. In the field, reliability is paramount; this switch features a fixed 170F trip point and a 130F reset differential (40F drop), making it a critical safety component for Reznor gas fired