Preserve thermal stability in Juniper EX4400 environments with the EX4400 AFO FAN spare. Built for rack-mounted network infrastructure, this replacement fan is intended to maintain airflow where switch density, ambient heat, and continuous operation leave little room for thermal drift. For infrastructure teams, fan spares are not a convenience item — they are part of the uptime plan. A failed cooling component can force a maintenance window, reduce switch reliability, or create unnecessary risk in access and aggregation layers. This EX4400 fan spare helps keep the platform operating within expected temperature ranges so critical network services stay available. Choose this part when you need a direct replacement aligned to the EX4400 hardware family. It is the right fit for teams that standardize on Juniper switching and want to keep service restoration fast, predictable, and tied to the original platform design rather than a generic substitute.