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As an OEM L170-7F limit switch
specifically covering sizes such as the PV200 and PV400
Replacing a carbon-fouled or oxidized 90 degree flame sensor is standard practice for restoring peak furnace performance and ensuring contractor-grade reliability
Robust Build: Fabricated from galvanized steel to provide long-term durability in plenum-rated environments
upgrading to a 40VA transformer is often recommended for systems with modern smart thermostats or multiple zone dampers that exceed the capacity of original 30VA units
York S1-3030-3791 Relay As an OEM L170-7F limitYork S1 3030 3791 24V Lockout Relay
US$ 159.00
US$ 404.50
