York S1-026-34726-001 Limit Switch It is standard practice to

It is standard practice to avoid Teflon tape on orifice threads to prevent debris from shearing off and clogging the

Safety Standard Compliance: A genuine OEM furnace part that ensures the system adheres to original manufacturer safety sequences for gas flow

The HH18HA138 is an automatic reset limit switch

Manual Reset Mechanism: Ensures the system cannot auto-restart until a contractor identifies and resolves the specific cause of the rollout

or high gas pressure

York S1-026-34726-001 Limit Switch It is standard practice toThe York S1 026 34726 001 Limit Switch is a critical safety component designed for precise thermal regulation within York, Luxaire, and Coleman HVAC systems. This SPST (Single Pole Single Throw) fixed temperature switch operates on a 110 140F automatic reset cycle, meaning it breaks the electrical circuit if the plenum temperature exceeds 140F and restores continuity once it drops to 110F. As a direct replacement for S1 2702 314P A, this OEM component