York S1-3030-3791 Relay upgrading to a 40VA transformer

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

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

and R45695-004

this reset thermal switch is the standard component for many Honeywell-equipped Bradford White atmospheric units requiring an L290F limit

York S1-3030-3791 Relay upgrading to a 40VA transformerYork S1 3030 3791 24V Lockout Relay