{"product_id":"carrier-tchc1850he403351-control-board-11kz9v","title":"OEM Carrier Economizer Control Board Kit HH63AW001 — TCHC1850HE403351","description":"\u003ch1\u003eOEM Carrier DCV Economizer Control Board Kit HH63AW001 for Model TCHC1850HE403351\u003c\/h1\u003e\u003cp\u003eThis is a genuine OEM Carrier Factory Authorized Part — the DCV Economizer Control Board Kit (part# \u003cstrong\u003eHH63AW001\u003c\/strong\u003e), engineered as the factory-specified replacement for the \u003cstrong\u003eCarrier TCHC1850HE403351\u003c\/strong\u003e commercial rooftop unit. The economizer control board is the brain of your unit's free-cooling system: it continuously monitors outdoor air conditions via CO₂ and enthalpy sensors, modulates the damper actuator, and decides when outside air is suitable for reducing mechanical cooling load. When this board fails, common symptoms include economizer fault codes, a damper stuck open or closed, loss of demand-controlled ventilation (DCV) response, or the unit falling back entirely on mechanical cooling — driving up energy costs and potentially triggering building code compliance issues.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e HH63AW001 | Cross-Reference: W7212A1017 | 120V \/ 60Hz | Dimensions approx. 4\" × 4\" × 2\" | Weight: 1 lb | All inputs Class 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part built to exact factory tolerances. Third-party boards may lack full DCV logic compatibility, risking mismatched sensor thresholds, damper hunting, or non-compliance with ASHRAE 62.1 ventilation standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 4\/5\u003c\/strong\u003e — Commercial rooftop board replacement. Requires disconnecting and labeling all low-voltage Class 2 wiring, actuator connectors, and sensor leads. Tools needed: insulated screwdrivers, needle-nose pliers, multimeter, and wiring diagram (pull from unit access panel). Recommend verifying sensor calibration after installation. Licensed commercial HVAC technician strongly advised.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on parts. Ships same business day from our warehouse. Carefully inspect all wiring harnesses for damage before installation to avoid repeat board failure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eTCHC1850HE403351\u003c\/strong\u003e commercial packaged rooftop unit equipped with a demand-controlled ventilation (DCV) economizer. Verify your existing board's part number against HH63AW001 or cross-reference W7212A1017 before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you buy — contact us today and ship same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640278176115,"sku":"CARRIE-TCHC1850HE403351-CONTROL_BOARD-HH63AW001","price":366.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640278208883,"sku":"CARRIE-TCHC1850HE403351-CONTROL_BOARD-HH63AW001-GEN","price":322.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-HH63AW001_3dabf2fd-02de-484a-9fca-d23bee898647.jpg?v=1775028991","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc1850he403351-control-board-11kz9v","provider":"National HVAC Parts","version":"1.0","type":"link"}