OEM Carrier DCV Economizer Control Board Kit HH63AW001 for Model TCHC1850HE403397

This is a genuine OEM Carrier Economizer Control Board Kit (part #HH63AW001), the factory-specified replacement for the Carrier TCHC1850HE403397 commercial rooftop unit. The DCV (Demand Control Ventilation) economizer control board is the intelligent hub of your unit's free-cooling and ventilation strategy — it continuously monitors outdoor air conditions, CO₂ levels (when a DCV sensor is present), and damper position to maximize energy savings while maintaining code-compliant indoor air quality. When this board fails, you may see symptoms including: economizer damper stuck open or closed, free-cooling lockout faults, loss of DCV response, or the unit defaulting to minimum ventilation with no outdoor-air modulation.

• Part Number & Cross-Reference: OEM Carrier HH63AW001 | Cross-references W7212A1017 | Factory Authorized Part — exact drop-in replacement with no modifications required.
• Specs: Voltage: 120V | Frequency: 60Hz | Board Dimensions: ~4" × 4" × 2" | Weight: 1 lb | All inputs Class 2 | Compatible with DCV CO₂ sensor inputs for demand-controlled ventilation applications.
• OEM vs Generic: OEM boards ship pre-configured to Carrier factory specifications, ensuring accurate sensor calibration, damper stroke timing, and fault-code communication with the main control board. Third-party substitutes often lack DCV logic firmware and may void unit warranty.
• Install Difficulty: 4/5 — Commercial rooftop board replacement. Requires lockout/tagout procedure, disconnecting 24V and 120V control wiring harnesses, and verifying DCV sensor wiring post-install. Tools needed: insulated screwdrivers, nut driver set, multimeter, wiring diagram from unit service label. Recommended for qualified commercial HVAC technicians only.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier TCHC1850HE403397 commercial rooftop unit. Always verify your existing board's part number on the component label before ordering. Cross-reference W7212A1017 is also superseded by HH63AW001. In stock and ready to ship — order before 3 PM for same-day dispatch. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy.