it requires a technician to physically inspect the heat exchanger and venting for blockages or cracks before the system can be restarted

Verify your model number on the silver data plate located inside the furnace cabinet

this single-row deep groove radial bearing is designed to minimize vibration and audible noise in high-speed rotating equipment

and 20314201

Johnson Controls P72CA-4 Pressure Control R-410A it requires a technician toJohnson Controls P72CA 4 Pressure Control, DPST Switch Only, 3 4" Conduit Opening, 20" to 100 Psi, Nema 1 Enclosure, No Adjustment Knob, 1 4" FNPT Connection P72CA 4 is identical to P72CA 4C