which will close the B-port when the system is de-energized

As a veteran-preferred thermopile replacement

Which motor shaft size is compatible with this blade

including the PTFE seats and neoprene O-rings

If your data plate or manual calls for 8406-086

Aaon G024540 Pressure Switch Els PW 17895 which will close the B-portThe Aaon G024540 High Pressure Switch is an essential safety component engineered for commercial HVAC units, providing critical protection against over pressurization. Specifically calibrated for R 410A systems, this switch features a 475 650 PSI operating range, functioning as a high limit cutout. As a manual reset pressure switch, it requires technician intervention following an event, ensuring that the root cause of high head pressure is addressed