{"product_id":"carrier-py1rea036074abwb-control-board-cyc67o","title":"OEM Carrier DSI Control Board LH33WP002 for PY1REA036074ABWB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP002 for Model PY1REA036074ABWB\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM \u003cstrong\u003eDirect Spark Ignition (DSI) Control Board\u003c\/strong\u003e (part number \u003cstrong\u003eLH33WP002\u003c\/strong\u003e) for the Carrier \u003cstrong\u003ePY1REA036074ABWB\u003c\/strong\u003e packaged unit. The DSI control board is the brain of the heating system — it sequences and monitors the entire ignition cycle, from energizing the inducer motor and proving the pressure switch, to firing the direct spark igniter and verifying flame establishment. When this board fails, the unit will typically enter a hard lockout after one or more failed ignition attempts, display fault codes, or produce no heat at all despite the thermostat calling for it.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e LH33WP002 (also supersedes LH33WP-002) | OEM Direct Spark Ignition (DSI) Control Board | Factory-original Carrier replacement | 460V ignition control module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM boards are programmed with Carrier's exact ignition timing, flame-sensing thresholds, and safety lockout logic. Aftermarket boards may use generic parameters that cause nuisance lockouts, void equipment warranties, or introduce unsafe ignition timing deviations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 4\/5\u003c\/strong\u003e — Requires disconnecting 24V control wiring, line-voltage harnesses, and flame sensor leads. Always shut off gas supply and 120V power at the disconnect before servicing. Tools needed: Phillips and flat-head screwdrivers, 1\/4\" nut driver, needle-nose pliers, phone camera (photograph all wiring before removal). Recommend a qualified HVAC technician for this repair.\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 warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the factory-specified DSI control board for Carrier model \u003cstrong\u003ePY1REA036074ABWB\u003c\/strong\u003e. Always verify the part number on your existing board's label before ordering — revisions (e.g., LH33WP002A) are also compatible. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you order — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640756064627,"sku":"CARRIE-PY1REA036074ABWB-CONTROL_BOARD-LH33WP002","price":487.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640756097395,"sku":"CARRIE-PY1REA036074ABWB-CONTROL_BOARD-LH33WP002-GEN","price":429.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP002_244b5fca-4a6d-4e6f-b7dc-5f8fcabcb47b.jpg?v=1775027696","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rea036074abwb-control-board-cyc67o","provider":"National HVAC Parts","version":"1.0","type":"link"}