The McQuay Daikin 349932121 Contactor is a precision-engineered OEM replacement part designed for high-demand HVAC and refrigeration systems

and Reliance brands

This HVAC collector box gasket is precision-engineered from high-grade elastomer materials to withstand the thermal cycling and corrosive condensate typical in high-efficiency furnace repair environments

and they are fully interchangeable in terms of fit

The Aaon OE250 Outside Air Temperature Sensor is a critical component for achieving precise HVAC head pressure control and economizer logic in Aaon rooftop units

Carrier 325423-401 Vent Coupling 326070-701 The McQuay Daikin 349932121 ContactorThe 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