{"product_id":"carrier-py2pnb024040aa-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 — PY2PNB024040AA","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY2PNB024040AA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier Direct Spark Ignition (DSI) control board, part number \u003cstrong\u003eLH33WP003\u003c\/strong\u003e, factory-specified for the \u003cstrong\u003eCarrier PY2PNB024040AA\u003c\/strong\u003e packaged rooftop unit. As the central brain of your heating system, this microprocessor-based board manages the entire ignition sequence — from spark ignition and gas valve activation to blower motor control, inducer fan sequencing, and flame sensing. When it fails, symptoms typically include a no-heat lockout condition, repeated ignition attempts with no flame establishment, or the system failing to advance past pre-purge — leaving your building without heat.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Direct Spark Ignition (DSI) microprocessor control | Manages spark igniter, gas valve, combustion blower, and indoor fan motor | Integrated LED fault-code diagnostics | Monitors limit switches, flame sensing, and safety lockout | Compatible with 24V control circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier factory part — not an aftermarket substitute. OEM boards are programmed to exact timing sequences (pre-purge, trial for ignition, retry, lockout) that aftermarket boards may approximate but not perfectly replicate, risking nuisance lockouts or warranty voids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 24V control wiring harness and line-voltage connections. Always shut off power at the disconnect and gas supply before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, phone camera to photograph all wiring before removal. Recommend licensed HVAC technician for rooftop unit service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePY2PNB024040AA\u003c\/strong\u003e packaged rooftop unit. Verify your existing board's part number against \u003cstrong\u003eLH33WP003\u003c\/strong\u003e or cross-reference \u003cstrong\u003eLH33WP003A\u003c\/strong\u003e before ordering. Not sure? Our HVAC parts specialists verify fitment at no charge — contact us before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640556671347,"sku":"CARRIE-PY2PNB024040AA-CONTROL_BOARD-LH33WP003","price":562.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640556704115,"sku":"CARRIE-PY2PNB024040AA-CONTROL_BOARD-LH33WP003-GEN","price":494.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_8b423ad7-8875-4c78-b7b0-87aa23b6692f.jpg?v=1775028274","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb024040aa-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}