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This 120V silicon carbide furnace igniter is designed to replace aging or cracked ignition components in residential and light commercial Trane and American Standard units
it is professional practice to test the lamp and inspect the socket for signs of arcing before concluding the ballast is the sole point of failure
For low-temperature applications using R404A
the 097720 (EX5-U21) is the direct technical successor and is interchangeable with earlier EX-U series models of the same capacity rating
Trane SWT3971 Pressure Switch 340155-7026 This 120V silicon carbide furnaceThe Trane SWT3971 Pressure Switch is an essential safety component engineered for induction monitoring in high efficiency Trane and American Standard furnaces. This SPST pressure switch (Single Pole Single Throw) is factory calibrated at a 1. 00" W. C. set point to ensure the inducer motor maintains the precise vacuum required for safe combustion and flue gas venting. As a 28VA pilot duty component, the SWT03971 effectively prevents the ignition cycle
US$ 129.00
US$ 187.47