{"product_id":"carrier-py3pna036060na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V for PY3PNA036060NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model PY3PNA036060NA\u003c\/h1\u003e\u003cp\u003eThe Carrier HT01BD209 is the factory-specified OEM control transformer for the \u003cstrong\u003ePY3PNA036060NA\u003c\/strong\u003e packaged unit. This transformer steps down 208\/240V line voltage to the 24V signal required by your thermostat, control board, contactor coils, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes will display. Replacing it with the correct OEM part restores full system communication and operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 208\/240V primary | 24V secondary | 50\/60 Hz | Class 2 control transformer | Replaces HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specs, protecting downstream boards and contactors from voltage sag or surge. Generic units with loose VA tolerances can cause nuisance tripping, erratic thermostat behavior, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before working on low-voltage wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, needle-nose pliers. Always label all 24V wires before disconnecting. Confirm 0V at transformer terminals before touching leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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\u003ePY3PNA036060NA\u003c\/strong\u003e packaged units. Verify your unit's data plate shows 208\/240V primary and 24V secondary before ordering. Cross-references: HT01BD207, HT01CN232, 9076-00, 4000A46E07AE28. Not sure it fits? Our fitment team verifies compatibility before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640391160179,"sku":"CARRIE-PY3PNA036060NA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640391192947,"sku":"CARRIE-PY3PNA036060NA-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_50f7da97-2edd-40f0-8c61-7fc7d2ae9617.jpg?v=1775025712","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna036060na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}