OEM Carrier DCV Economizer Control Board Kit HH63AW001 for Model TCHC1850HE403399

This is a genuine OEM Carrier Factory Authorized Part — the HH63AW001 DCV Economizer Control Board Kit — engineered as the factory-specified replacement for the Carrier TCHC1850HE403399 commercial rooftop unit. The economizer control board serves as the operational brain of the economizer assembly, continuously monitoring outdoor air conditions via CO₂ and enthalpy sensors and modulating the outside air damper to maximize free cooling and minimize mechanical cooling energy draw. When this board fails, symptoms include economizer dampers stuck open or closed, demand-controlled ventilation (DCV) no longer responding to occupancy sensors, erratic damper hunting, fault codes related to the economizer circuit, or total loss of fresh-air control — all of which compromise indoor air quality and energy performance.

• Part Number & Cross Reference: OEM part HH63AW001 | Cross-reference: W7212A1017 | Factory Authorized Parts by Carrier Corporation | Input class: Class 2
• OEM vs Generic: This board is factory-matched to Carrier's RTU communication protocol and sensor inputs. Non-OEM boards often lack exact firmware calibration for Carrier's DCV algorithms, leading to damper drift, sensor misreads, and failed commissioning — costly issues in commercial applications subject to ASHRAE 62.1 ventilation codes.
• Install Difficulty: 4/5 — Commercial rooftop work requires roof access, lockout/tagout procedures, and familiarity with BACnet or Carrier proprietary controls wiring. Tools needed: torx/Phillips drivers, multimeter, laptop with Carrier configuration software (if DCV re-commissioning is required), and wiring diagrams. Strongly recommended for qualified commercial HVAC technicians only.
• Warranty: 1-year OEM factory warranty on parts. Ships same business day from our warehouse. Secure packaging to prevent board damage in transit.

Compatibility: Engineered for the Carrier TCHC1850HE403399 commercial packaged rooftop unit. Also compatible with select Bryant and Payne commercial RTU models sharing the W7212A1017 / HH63AW001 control specification — verify your unit's data plate and wiring diagram before ordering. Our parts specialists are available to confirm fitment prior to purchase. Order now and ship today.