{"product_id":"carrier-tchc2550hecmrmy501-control-board-cyc67o","title":"OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRMY501","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model TCHC2550HECMRMY501\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier Direct Spark Ignition (DSI) Control Board, part number \u003cstrong\u003eLH33WP002\u003c\/strong\u003e, factory-specified for the \u003cstrong\u003eCarrier TCHC2550HECMRMY501\u003c\/strong\u003e. The DSI control board serves as the brain of the heating system — it sequences the inducer motor, manages gas valve timing, fires the direct spark igniter, and continuously monitors the flame sensor signal. When this board fails, you will typically experience a complete no-heat condition, repeated ignition lockouts, fault codes on the system, or a furnace that attempts ignition and immediately shuts down without establishing a flame.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Direct Spark Ignition (DSI) control board | 460V application | Replaces LH33WP002A | Factory-programmed timing and lockout sequences for Carrier equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM board with factory-calibrated ignition timing, lockout delay thresholds, and safety trip logic. Aftermarket boards may carry incompatible firmware or imprecise flame-sensing thresholds, risking nuisance lockouts or unsafe ignition behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Shut off gas supply and 120V power before servicing. Photograph all wiring harness connections prior to disconnecting. Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, phone camera for documentation. Clear any fault codes after installation and verify ignition sequence through a full call-for-heat cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 TCHC2550HECMRMY501\u003c\/strong\u003e. Also fits select Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, and 589 series — verify your unit's data plate and existing part number before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640270147955,"sku":"CARRIE-TCHC2550HECMRMY501-CONTROL_BOARD-LH33WP002","price":501.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640270180723,"sku":"CARRIE-TCHC2550HECMRMY501-CONTROL_BOARD-LH33WP002-GEN","price":441.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP002_2943015b-23df-43d0-b4f2-9b8b3b599296.jpg?v=1775027853","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc2550hecmrmy501-control-board-cyc67o","provider":"National HVAC Parts","version":"1.0","type":"link"}