Trane SWT3273 Pressure Switch 318518-761 A new gasket is required

A new gasket is required during installation to prevent air bypass which can lead to inefficient combustion and condensation leaks

delivering a nominal 5KW heating capacity

and always perform a soap-bubble leak test on the connection point after restoring gas pressure

You can temporarily restore function using a fine abrasive like steel wool

wrap the conductor through the center hole multiple times

Trane SWT3273 Pressure Switch 318518-761 A new gasket is requiredThe Trane SWT3273 Pressure Switch is a mission critical high pressure cutout switch engineered for heavy duty commercial and residential integrated HVAC systems. Designed as a normally closed SPST safety device, this switch is a primary defense mechanism against system rupture and compressor failure. It features a precise 650 PSI opening point to interrupt the control circuit when head pressure exceeds safe limits, with a 500 PSI closing point for