Lennox 80W53 Pressure Switch 319825-402 How do I calibrate the

How do I calibrate the T-4506-203 for accurate switchover

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Lennox 80W53 Pressure Switch 319825-402 How do I calibrate theThe Lennox 80W53 Pressure Switch is a critical OEM replacement part engineered for high efficiency furnace applications. This single pole single throw (SPST) switch is factory calibrated to a 0. 68" WC (water column) set point, ensuring precise monitoring of the inducer motor's draft. A failure in this component often results in a sequence of operation lockout, as the control board must verify proper venting before allowing gas valve ignition.