{"product_id":"carrier-tchc2550hecmrly500-control-board-cyc67o","title":"OEM Carrier DSI Control Board LH33WP002 — TCHC2550HECMRLY500","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model TCHC2550HECMRLY500\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 TCHC2550HECMRLY500\u003c\/strong\u003e. The DSI control board is the brain of your heating system — it sequences the ignition cycle, energizes the spark igniter and gas valve, monitors flame sensing, and manages blower motor timing. When this board fails, common symptoms include a hard lockout with no ignition attempt, repeated ignition retries without flame establishment, a system that fires briefly then shuts down, or a complete no-heat condition with fault codes stored in the control.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Specs:\u003c\/strong\u003e Direct Spark Ignition (DSI) microprocessor-based control board | OEM Part # LH33WP002 | Replaces: LH33WP002A | Controls combustion sequencing, spark igniter, gas valve, blower motor, and flame sensing\/lockout logic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e This is a genuine Carrier OEM board — factory-programmed with exact timing parameters, lockout thresholds, and safety sequencing for your unit. Aftermarket boards may use approximated firmware that causes nuisance lockouts, improper blower delays, or voided equipment warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires shutting off power and gas supply before servicing. Photograph all wiring harness connections prior to disconnecting. Tools needed: Phillips-head and flat-head screwdrivers, needle-nose pliers, a multimeter for verifying 24V control circuit integrity post-install. Recommended for experienced DIYers or licensed HVAC technicians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eTCHC2550HECMRLY500\u003c\/strong\u003e. This board is also used across select Carrier, Bryant, and Payne packaged and split-system models in the 48, 574, 580, 581, 582, 583, 588, and 589 series — always verify your unit's data plate and existing part number before ordering. Our fitment team is available to confirm compatibility before you purchase.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640273064307,"sku":"CARRIE-TCHC2550HECMRLY500-CONTROL_BOARD-LH33WP002","price":525.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640273097075,"sku":"CARRIE-TCHC2550HECMRLY500-CONTROL_BOARD-LH33WP002-GEN","price":462.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP002_eb06d957-82ac-4e2a-8fd5-d6222bea29bd.jpg?v=1775027861","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc2550hecmrly500-control-board-cyc67o","provider":"National HVAC Parts","version":"1.0","type":"link"}