BCFURNACE
773-136
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YORK PRESSURE SWITCH 2-STG -0.25" WC / -0.40" WC
Pickup available at 75 Blue Mountain St #3
Usually ready in 24 hours

YORK PRESSURE SWITCH 2-STG -0.25" WC / -0.40" WC Air Pressure Switch, Air Proving
+5% Tax • Shipping calculated at checkout.
U.S. Duties/Taxes, if applicable, may be due at time of delivery.
Pickup available at 75 Blue Mountain St #3
Usually ready in 24 hours
This high-quality 2-stage air pressure switch is a vital safety component for high-efficiency gas furnaces and residential HVAC systems. Designed to monitor the negative pressure created by the inducer blower motor, this air proving switch ensures that the heating system has proper airflow and venting before allowing the ignition process to begin. With dual-stage calibration at -0.25" WC and -0.40" WC, it provides precise draft detection to prevent the furnace from operating under unsafe conditions, such as a blocked flue or a failing vent motor. If your heating unit is cycling incorrectly or failing to ignite due to pressure switch error codes, this replacement part is essential for restoring reliable, energy-efficient performance to your dual-stage furnace.
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