{"product_id":"carrier-tchc2550hecmray100-control-board-cyc67o","title":"OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRAY100","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model TCHC2550HECMRAY100\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM \u003cstrong\u003eDirect Spark Ignition (DSI) Control Board\u003c\/strong\u003e for the \u003cstrong\u003eCarrier TCHC2550HECMRAY100\u003c\/strong\u003e heating system. Part number \u003cstrong\u003eLH33WP002\u003c\/strong\u003e serves as the electronic brain of the ignition sequence — it manages spark timing, monitors flame presence, controls gas valve operation, and sequences the inducer and blower motors. When this board fails, the unit will typically enter a hard lockout, attempt repeated ignition cycles with no flame establishment, or fail to energize the gas valve entirely. A faulty DSI board is one of the most common causes of a no-heat call that does not resolve with igniter or flame sensor replacement alone.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Direct Spark Ignition (DSI) control board | 460V application | Replaces superseded part LH33WP002A | Factory-matched timing and safety lockout sequences\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM control boards use factory-programmed logic and tested components. Aftermarket boards may have incompatible ignition trial timing or lockout thresholds, leading to nuisance faults or unsafe operation — always use OEM for ignition controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Disconnect power and verify zero voltage before touching the board. Tools needed: 1\/4\" and 5\/16\" nut drivers, flathead screwdriver, smartphone camera (photograph all wiring harness connections before removal). Transfer wire harnesses one at a time to avoid miswiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for \u003cstrong\u003eCarrier model TCHC2550HECMRAY100\u003c\/strong\u003e. Also used across select Carrier, Bryant, and Payne packaged and commercial heating units in the 48, 574, 580, 581, 582, 583, 588, and 589 series — verify your unit's data plate and existing board part number before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640276210035,"sku":"CARRIE-TCHC2550HECMRAY100-CONTROL_BOARD-LH33WP002","price":499.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640276242803,"sku":"CARRIE-TCHC2550HECMRAY100-CONTROL_BOARD-LH33WP002-GEN","price":439.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP002_46064e6d-3d7e-45ba-b6fc-d46a7770c5d0.jpg?v=1775027840","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc2550hecmray100-control-board-cyc67o","provider":"National HVAC Parts","version":"1.0","type":"link"}