{"product_id":"carrier-tchc2550hecmrmy500-control-board-cyc67o","title":"OEM Carrier DSI Control Board LH33WP002 for TCHC2550HECMRMY500","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model TCHC2550HECMRMY500\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier \u003cstrong\u003eDirect Spark Ignition (DSI) Control Board\u003c\/strong\u003e, part number \u003cstrong\u003eLH33WP002\u003c\/strong\u003e, factory-specified for the \u003cstrong\u003eCarrier TCHC2550HECMRMY500\u003c\/strong\u003e packaged heating and cooling unit. The DSI control board serves as the brain of the ignition sequence — it manages spark timing, monitors flame rectification, and coordinates gas valve operation on every call for heat. When this board fails, common symptoms include a hard lockout with no ignition attempt, intermittent no-heat calls, erratic cycling, or a fault code indicating ignition failure after multiple retries. Replacing it with the correct OEM board restores factory-programmed timing and safety logic that aftermarket alternatives cannot always replicate.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 460V application | Direct Spark Ignition (DSI) type | OEM part number LH33WP002 | Supersedes LH33WP002A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM DSI control boards carry factory-programmed ignition timing, retry lockout counts, and safety thresholds. Generic boards often use generalized firmware that can cause nuisance lockouts, mis-timed spark, or void equipment warranties on commercial units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Shut off power at the disconnect and verify zero voltage before touching any board terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone camera to photograph all wiring harness positions before removal. Label every connector. Note: DSI boards on commercial packaged units may require a control board reset sequence after installation — consult the unit's service manual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for the Carrier \u003cstrong\u003eTCHC2550HECMRMY500\u003c\/strong\u003e packaged unit. Also used on select Carrier, Bryant, and Payne models in the 48, 574, 580, 581, 582, 583, 588, and 589 series — always confirm your unit's data plate and existing board part number before ordering. Our parts specialists are available to verify fitment prior to purchase.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640270344563,"sku":"CARRIE-TCHC2550HECMRMY500-CONTROL_BOARD-LH33WP002","price":500.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640270377331,"sku":"CARRIE-TCHC2550HECMRMY500-CONTROL_BOARD-LH33WP002-GEN","price":440.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP002_c43653d5-11c0-4d05-ac42-0d6a4d790c1b.jpg?v=1775027850","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc2550hecmrmy500-control-board-cyc67o","provider":"National HVAC Parts","version":"1.0","type":"link"}