Carrier 325423-401 Vent Coupling 321142-301 Is this compatible with older

Is this compatible with older MC3000 or MC4000 series setups

High Electrical Rating: Rated for up to 20A at 240V and 16A at 277V

or error codes on the ignition module indicating a pilot valve circuit failure

provided the discharge piping is self-draining

delivering a consistent 1450 RPM to ensure precise airflow and thermal regulation

Carrier 325423-401 Vent Coupling 321142-301 Is this compatible with olderThe Carrier 325423 401 Vent Coupling is a critical OEM replacement part designed specifically for condensing gas furnaces. This flexible rubber coupling provides a secure, airtight seal between the furnace's secondary heat exchanger and the PVC vent piping, ensuring the safe induction of combustion air and the efficient removal of flue gases. Specifically engineered for 90+ AFUE furnaces, including the Carrier PG9MAA, PG9MXA, and PG9UAA series, this