High BTU Capacity: Rated up to 415

As a direct 626435R cross reference

Standard protocols recommend not exceeding 1/2 PSI (14" WC) inlet pressure to avoid damaging the internal regulator components

High Thermal Stability: Reinforced Teflon construction prevents seal hardening or deformation during high-load operations

preventing equipment damage and hazardous operating conditions

Marley Engineered Products 4520-2018-003 Limit Switch High BTU Capacity: Rated upThe Marley Engineered Products 4520 2018 003 Limit Switch is a critical safety component engineered for forced air heating applications where precise thermal protection is non negotiable. This 180 degree F auto reset limit switch serves as a high limit safety cut out, functioning as a normally closed (NC) switch that opens the circuit if the plenum or heating element temperature exceeds the 180F threshold. As a genuine Marley OEM replacement part, it