{"product_id":"carrier-ph1sea090000aaaa-transformer-h302a1","title":"OEM Carrier 75VA Transformer 200\/230\/460V–24V for PH1SEA090000AAAA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD236 for Model PH1SEA090000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01BD236) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH1SEA090000AAAA\u003c\/strong\u003e packaged heat pump unit. The transformer steps high-voltage primary power — \u003cstrong\u003e200\/230\/460V\u003c\/strong\u003e — down to a safe \u003cstrong\u003e24V AC secondary\u003c\/strong\u003e output that energizes the entire low-voltage control circuit: thermostat, contactor coil, reversing valve, and safety controls. When the transformer fails, the result is typically a completely unresponsive system — the thermostat goes dark, nothing calls for heating or cooling, and the unit sits completely dead. A blown transformer is often caused by a shorted wire, a stuck contactor coil, or a control board fault — always diagnose the root cause before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA rating | Primary: 200\/230\/460V multi-tap | Secondary: 24V AC | Class 2 | 50\/60 Hz | Factory OEM part #HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer, manufactured to exact factory VA rating and impedance tolerances. Generic alternatives risk nuisance tripping, under-voltage to controls, or premature failure due to looser VA and thermal ratings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before servicing. Tools needed: multimeter, flat-head and Phillips screwdrivers, wire stripper, needle-nose pliers. Label all 24V wiring before disconnecting. Verify primary tap matches your supply voltage. Check for downstream shorts before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse — order by 3PM local time for same-day dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for Carrier model \u003cstrong\u003ePH1SEA090000AAAA\u003c\/strong\u003e packaged heat pump units. Also replaces legacy part numbers HT01BD235, HT01AX050, HT01BZ236, P541-7702, P541-7703, 305398-701, 15B0002N02, and 15B0002N05. Confirm your unit's supply voltage and verify the correct primary tap before installation. Not sure this is your part? Our HVAC parts specialists verify fitment before you order — call or chat today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641547444595,"sku":"CARRIE-PH1SEA090000AAAA-TRANSFORMER-HT01BD236","price":106.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641547477363,"sku":"CARRIE-PH1SEA090000AAAA-TRANSFORMER-HT01BD236-GEN","price":93.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD236.jpg?v=1775016747","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1sea090000aaaa-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}