{"product_id":"carrier-py3gna042060nb-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3GNA042060NB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3GNA042060NB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier Direct Spark Ignition (DSI) control board (part number \u003cstrong\u003eLH33WP003\u003c\/strong\u003e), the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNA042060NB\u003c\/strong\u003e packaged rooftop unit. The DSI control board is the operational brain of your heating system — it sequences the entire ignition cycle, commands gas valve activation, monitors flame sensing, controls the blower and indoor fan motors, and manages inducer motor operation. When this board fails, symptoms include a complete no-heat condition, repeated ignition lockout faults, furnace short-cycling, or the system failing to progress past the inducer pre-purge stage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number \u0026amp; Electrical Specs:\u003c\/strong\u003e OEM Part # LH33WP003 (also supersedes LH33WP003A) | 24 VAC control voltage | 208\/230 VAC 60Hz power input | Direct Spark Ignition (DSI) type\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKey Functions:\u003c\/strong\u003e Manages spark ignition sequencing, gas valve activation, flame rod signal processing, blower\/fan motor staging, induction motor control, and safety lockout with \u003cstrong\u003eLED fault code diagnostics\u003c\/strong\u003e for faster field troubleshooting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e This factory-authorized OEM board is manufactured to Carrier's original design standards, ensuring full pin-for-pin connector compatibility and preserving system safety interlocks. Aftermarket boards may omit diagnostic LED functionality and carry wider electrical tolerances that can stress downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires de-energizing and locking out the unit before opening the control panel. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, a phone or camera to photograph all wiring harness connections before removal. Reconnect harnesses per original routing; misrouted wiring can trigger false fault codes. Recommend an HVAC-certified technician for installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct factory replacement for the \u003cstrong\u003eCarrier PY3GNA042060NB\u003c\/strong\u003e packaged rooftop unit. Also fits additional Carrier, Bryant, and ICP family rooftop models — verify your OEM part number on the unit's data plate before ordering. Not sure if this is the right board? Our HVAC parts specialists verify fitment before you order — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640477438323,"sku":"CARRIE-PY3GNA042060NB-CONTROL_BOARD-LH33WP003","price":437.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640477471091,"sku":"CARRIE-PY3GNA042060NB-CONTROL_BOARD-LH33WP003-GEN","price":384.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_b120b911-a309-40dc-8bd8-8cc62b5ed26b.jpg?v=1775028085","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna042060nb-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}