OEM Carrier DCV Economizer Control Board Kit HH63AW001 for Model TCHC1850HE400984

This is a genuine OEM Carrier Factory Authorized Part — the DCV Economizer Control Board Kit (part# HH63AW001) — designed as a direct, factory-matched replacement for the Carrier TCHC1850HE400984 commercial rooftop unit. The economizer control board is the intelligence center of your unit's economizer system: it continuously monitors outdoor and return-air conditions, modulates the outdoor air damper to maximize free cooling, and enforces demand-controlled ventilation (DCV) to maintain indoor air quality while minimizing mechanical cooling loads. When this board fails, common symptoms include a stuck-open or stuck-closed damper, inability to enter economizer mode, erratic outdoor air percentages, fault codes on the unit controller, or a complete economizer lockout that forces full mechanical cooling — driving up energy costs and reducing occupant comfort.

• OEM Part Number: HH63AW001 | Cross-reference: W7212A1017 | Factory Authorized Parts — Carrier Corporation
• Specs: Input voltage 120V | 60 Hz | All inputs Class 2 | Dimensions approx. 4.7" L × 3.2" W | Weight: 1 lb | Compatible with DCV (CO₂-based demand-controlled ventilation) economizer assemblies
• OEM vs Generic: This is a genuine Carrier OEM board — not an aftermarket clone. OEM boards carry factory firmware, correct I/O logic for your specific RTU platform, and validated sensor thresholds. Aftermarket boards may use incompatible firmware or miscalibrated analog inputs that cause phantom fault codes or damper over-travel.
• Install Difficulty: 3/5 — Requires disconnection of 24V and Class 2 low-voltage wiring harnesses plus the damper actuator link. Always de-energize the unit at the disconnect before servicing. Recommended tools: #2 Phillips and flathead screwdrivers, needle-nose pliers, multimeter, wiring camera/phone for photo documentation. A qualified HVAC technician is strongly recommended for this repair.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier TCHC1850HE400984 commercial rooftop unit economizer assembly. Also cross-references to Bryant and Payne commercial RTU platforms using the W7212A1017 control. Verify your existing board's part number label before ordering — our parts specialists are available to confirm fitment at no charge. Order today and ship today — in stock and ready to go.