{"product_id":"carrier-py2pnb030040ab-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY2PNB030040AB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY2PNB030040AB\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 PY2PNB030040AB\u003c\/strong\u003e packaged rooftop unit. The DSI control board is the brain of the heating system — it orchestrates spark ignition sequencing, gas valve activation, inducer and blower motor operation, flame sensing, and safety lockout logic. When this board fails, you may experience a no-heat condition, repeated ignition lockouts, or erratic fan behavior with no fault recovery. LED diagnostics on the board help technicians pinpoint fault codes during troubleshooting.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Direct Spark Ignition (DSI) microprocessor-based control | Manages combustion, blower, and indoor fan motors | Monitors spark igniter, gas valve, flame sensing, and safety lockout | Status LED fault code indicators for fast diagnostics | Factory part number: LH33WP003 \/ LH33WP003A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier factory-authorized OEM board manufactured to exact original design standards. Aftermarket substitutes may not match timing sequences, lockout parameters, or connector layouts — risking misdiagnosis, voided warranties, or recurring failure. OEM is always the correct choice for commercial rooftop applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage before touching any board terminals. Tools needed: Phillips and flat-head screwdrivers, needle-nose pliers, smartphone or camera to photograph all wiring harness connections before removal. Transfer wiring one connector at a time. Re-verify all safety switch connections before restoring power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on this part. 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 Factory-matched replacement for Carrier model \u003cstrong\u003ePY2PNB030040AB\u003c\/strong\u003e packaged rooftop unit. Verify your existing board's part number (LH33WP003 or LH33WP003A) against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640545497459,"sku":"CARRIE-PY2PNB030040AB-CONTROL_BOARD-LH33WP003","price":562.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640545530227,"sku":"CARRIE-PY2PNB030040AB-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_4b0e00c1-6522-443b-b53e-d27c421c8dd6.jpg?v=1775028026","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb030040ab-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}