Trane SWT2293 Pressure Switch

As an experienced technician, you know that a furnace is only as reliable as its safety chain. The Trane SWT2293 Pressure Switch is a critical OEM replacement part engineered for Trane and American Standard gas furnaces. This Single Pole Normally Open (SPNO) switch is factory-calibrated with a precise -0.55" WC open rating and a -0.65" WC close rating. It serves as the primary safeguard for inducer motor performance, ensuring the combustion blower maintains the specific negative pressure necessary to vent flue gases safely through the heat exchanger. If the inducer assembly fails to reach the required RPM or if there is a blocked vent pipe, the diaphragm remains open, preventing the ignition control board from proceeding with the fire sequence. Built to withstand high-duty cycles, this air pressure switch replaces legacy part numbers SWT02293 and C341750P01, providing a direct-fit solution that eliminates the risk of nuisance trips often associated with generic alternatives.

• Precise Signal Accuracy: Calibrated to -0.55" WC / -0.65" WC to match original engineering specs for 80% and 90%+ efficiency models.
• Direct OEM Replacement: Replaces SWT02293 and C341750P01 across a wide range of American Standard gas furnaces.
• Enhanced Safety Logic: High-quality SPNO contact configuration prevents the system from energizing the gas valve during low draft conditions.
• Universal Compatibility: Standard quick-disconnect terminals and single hose port allow for rapid field installation.

What causes a Trane pressure switch to stay open?
Outside of a mechanical switch failure, check for a clogged inducer port, water in the pressure switch tubing, or a blocked flue vent. Also verify that the inducer motor is pulling the rated Inches of Water Column using a manometer.

Is the SWT2293 interchangeable with the SWT02293?
Yes, the SWT2293 and SWT02293 are functionally identical. Most modern stock uses the SWT02293 part number, which is the direct Trane OEM successor for the original 2293 series.

How do I test this switch on a service call?
With the furnace powered down, use a multimeter to check for continuity. The switch should be open. While the inducer motor is running, use a manometer at the T-junction to verify pressure exceeds -0.65" WC; at this point, the circuit should close.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.