{"product_id":"carrier-py3ppa036090nb-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/230V–24V — PY3PPA036090NB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V to 24V for Model PY3PPA036090NB\u003c\/h1\u003e\u003cp\u003eThis genuine OEM Carrier control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3PPA036090NB\u003c\/strong\u003e packaged heating and cooling unit. The transformer steps high-voltage line power (208\/230V primary) down to the 24V signal used by your thermostat, control board, gas valve, and all low-voltage components. When this part fails, the entire control circuit loses power — resulting in a completely unresponsive system, a blank thermostat display, or a unit that won't respond to any heating or cooling calls.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/230V primary input | 24V secondary output | 50\/60 Hz rated | OEM part number HT01BD209 | Replaces HT01BD207, HT01CN232, 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can sag under peak control-circuit load, causing intermittent lockouts and premature board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker and verify zero voltage at the transformer terminals with a multimeter before touching any wires. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph the existing wiring before disconnecting — wire colors and terminal labels must match exactly.\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 Designed for Carrier model \u003cstrong\u003ePY3PPA036090NB\u003c\/strong\u003e packaged units. Cross-references: HT01BD207, HT01CN232, 4000A46E07AE28, 9076-00. Verify your unit's data plate voltage specifications before ordering. Our parts team is available to confirm fitment prior to purchase — don't guess on a control transformer.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640360096115,"sku":"CARRIE-PY3PPA036090NB-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640360128883,"sku":"CARRIE-PY3PPA036090NB-TRANSFORMER-HT01BD209-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_dc56cca4-b3df-48a7-8887-919d83bc92f5.jpg?v=1775025551","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa036090nb-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}