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This is the factory-specified OEM economizer control board kit for the Carrier PGACCYCRECOMZR042A00 packaged rooftop unit. The economizer control board manages the outdoor air damper sequence, enthalpy/dry-bulb sensor inputs, and free-cooling logic — coordinating with the unit's main control circuit to maximize energy efficiency by using outdoor air for cooling when conditions allow. When this board fails, common symptoms include a stuck-open or stuck-closed damper, loss of free-cooling mode, economizer fault codes on the thermostat or BAS display, or the unit falling back to full mechanical cooling regardless of outdoor conditions.
Compatibility: Engineered as a direct OEM replacement for Carrier model PGACCYCRECOMZR042A00 3.5-ton packaged rooftop units equipped with the factory economizer option. Always verify OEM part number HH63AW001 against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. Order now and ship today!