Using the OEM York pressure switch is recommended to ensure the specific inches of water column calibration matches your unit's safety profile

Precise Pressure Calibration: Rated for an 8-11 psi range to ensure accurate valve modulation

such as the inducer motor running without flame establishment

Can I use this bearing in non-Trane air handlers

and GB3BM units

Allanson 421-BT299 Transformer Els PW 17895 Using the OEM York pressureThe Allanson 421 BT299 is a heavy duty ferromagnetic ignition transformer designed for reliable high voltage performance in demanding oil burner applications. As a veteran grade service replacement transformer, this 120V ignition transformer delivers a consistent 10,000V secondary output at 23mA with a mid point ground configuration, ensuring a stable spark even in older recovery systems. Unlike standard units, the 421 BT299 is a universal oil ignitor