{"product_id":"carrier-py3ppa048115nb-control-board-cyc67p","title":"OEM Carrier DSI Control Board LH33WP003 for PY3PPA048115NB","description":"\u003ch1\u003eOEM Carrier Direct Spark Ignition (DSI) Control Board LH33WP003 for Model PY3PPA048115NB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier \u003cstrong\u003eDirect Spark Ignition (DSI) Control Board\u003c\/strong\u003e, part number \u003cstrong\u003eLH33WP003\u003c\/strong\u003e, factory-specified for the \u003cstrong\u003eCarrier PY3PPA048115NB\u003c\/strong\u003e packaged rooftop unit. As the central brain of your unit's heating system, this microprocessor-based board manages the full ignition sequence — from spark ignition and gas valve activation to blower motor control, inducer motor supervision, flame sensing, and safety lockout. When this board fails, symptoms typically include a no-heat condition, repeated ignition lockout, short-cycling, erratic fan behavior, or the system failing to advance past the pre-purge stage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Direct Spark Ignition (DSI) microprocessor-based control | Manages spark igniter, gas valve, combustion blower, and indoor blower motor | Monitors limit switches, flame sensor, and safety circuits | Integrated LED fault-code diagnostics for fast field troubleshooting | Pre-purge: 45 sec | Trial for ignition: 5+2 sec | Retry interval: 20 sec for 15 min | Manual-reset lockout\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 Carrier ignition timing, flame-sensing thresholds, and lockout sequences. Aftermarket boards may deviate from factory parameters, risking nuisance lockouts, voided equipment warranties, or unsafe operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 4\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: ¼\" nut driver, Phillips screwdriver, needle-nose pliers, multimeter. Photograph or label all wiring harness connections before removal. Verify 24V control power is present before condemning the board. Recommended for qualified HVAC technicians only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PY3PPA048115NB\u003c\/strong\u003e packaged rooftop unit. Cross-references include suffix variant \u003cstrong\u003eLH33WP003A\u003c\/strong\u003e. Always verify your existing board's part number on the board label or unit 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":62640350069107,"sku":"CARRIE-PY3PPA048115NB-CONTROL_BOARD-LH33WP003","price":450.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640350101875,"sku":"CARRIE-PY3PPA048115NB-CONTROL_BOARD-LH33WP003-GEN","price":396.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-LH33WP003_15ccc1ed-524d-495f-bbbe-afee714e101f.jpg?v=1775028209","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa048115nb-control-board-cyc67p","provider":"National HVAC Parts","version":"1.0","type":"link"}