OEM Carrier Economizer Control Board Kit HH63AW001 for Model TCHC1850HE403358

This is the factory OEM replacement Economizer Control Board Kit (Part # HH63AW001) for the Carrier TCHC1850HE403358 commercial rooftop unit. The economizer control board manages the outdoor air damper actuator, monitors enthalpy or dry-bulb sensors, and coordinates free-cooling cycles to maximize energy efficiency. When this board fails, common symptoms include economizer dampers stuck open or closed, fault codes on the thermostat or BAS interface, erratic damper hunting, or a complete loss of economizer function — causing the unit to run mechanical cooling even when outdoor conditions would allow free cooling.

• Specs: OEM Part # HH63AW001 | Economizer Control Board Kit | Factory-matched for Carrier TCHC1850HE403358 commercial rooftop | Includes all necessary mounting hardware per kit specification
• OEM vs Generic: This is a genuine Carrier OEM board — firmware, sensor calibration thresholds, and damper actuator signal profiles are factory-programmed to exact specifications. Aftermarket boards may lack proper enthalpy calibration, resulting in incorrect free-cooling lockout points and failed energy code compliance.
• Install Difficulty: 3/5 — Requires shutdown of the rooftop unit and lockout/tagout procedure. Tools needed: flathead and Phillips screwdrivers, 1/4" and 5/16" nut drivers, multimeter, and wiring diagram (located inside unit panel door). Photograph all wiring harness connections before disconnecting. Re-commissioning the economizer per Carrier startup procedure is recommended after installation.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier TCHC1850HE403358 commercial packaged rooftop unit. Always verify your existing board's part number against HH63AW001 before ordering, and confirm economizer type (enthalpy vs. dry-bulb) matches your unit's original configuration. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. Order today and ships same business day.