OEM Carrier DCV Economizer Control Board Kit HH63AW001 for Model TCHC1850HE403352

This is a genuine OEM Carrier Factory Authorized Part — the HH63AW001 DCV Economizer Control Board Kit — factory-specified for the Carrier TCHC1850HE403352 commercial rooftop unit. The economizer control board is the intelligence center of your unit's free-cooling and demand-controlled ventilation (DCV) system. It continuously monitors outdoor air conditions, CO₂ levels (when DCV-enabled), and damper position feedback to optimize the blend of outside and recirculated air — reducing mechanical cooling load and improving indoor air quality. When this board fails, common symptoms include a stuck-open or stuck-closed economizer damper, loss of DCV functionality, erratic or hunting damper behavior, fault codes on the unit controller, or a complete inability to bring in outside air. Left unresolved, a failed board can drive up energy costs significantly or cause indoor air quality compliance failures in commercial applications.

• Specs: OEM Part # HH63AW001 | Cross-ref: W7212A1017 | Input Voltage: 120V / 60Hz | Board Dimensions: approx. 4" × 4" × 2" | Weight: 1 lb | All inputs Class 2 | Factory Authorized Parts — Carrier Corporation
• OEM vs Generic: This is a genuine Carrier Factory Authorized replacement. Third-party economizer boards frequently lack the precise firmware calibration required for DCV sensor integration and damper actuator feedback loops, risking non-compliance with ASHRAE 62.1 ventilation standards and building energy codes.
• Install Difficulty: 3/5 — Requires disconnecting 24V and 120V wiring harnesses and documenting all sensor leads before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wiring labels. Always de-energize the unit at the disconnect before servicing. Recommend verifying damper actuator and CO₂ sensor integrity before condemning the board.
• Warranty: 1-year OEM factory warranty on this genuine Carrier part. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model TCHC1850HE403352 commercial packaged rooftop units equipped with the DCV economizer option. Cross-references Honeywell W7212A1017. Verify your existing board's part number on the label before ordering. Our fitment team is available to confirm compatibility — contact us before you buy.