{"product_id":"carrier-c4850c48zg055600-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C48ZG055600","description":"\u003ch1\u003eOEM Carrier Control Circuit Transformer 40VA for Model C4850C48ZG055600\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C4850C48ZG055600\u003c\/strong\u003e packaged unit. Its job is to convert 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails, absolutely nothing in your control circuit will respond — the thermostat goes dark, the system won't call for heating or cooling, and no fault codes will even appear because there's no power to generate them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output tolerance for stable control-circuit voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications. Undersized or off-tolerance generic units can cause nuisance tripping, premature control board failure, or erratic thermostat behavior — especially under peak demand when the contactor coil draws full current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Note wire colors and terminal positions before disconnecting the old unit. Reconnect primary (line voltage) leads first, then secondary (24V) leads.\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 Engineered specifically for the Carrier \u003cstrong\u003eC4850C48ZG055600\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate or original transformer label before ordering. Need help verifying fitment? Our HVAC parts team will confirm compatibility before you buy — just reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909863625075,"sku":"CARRIE-C4850C48ZG055600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909863657843,"sku":"CARRIE-C4850C48ZG055600-TRANSFORMER-HT01BD236-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD236_0c0c5b0d-1b63-4832-a62b-1b43c807de23.jpg?v=1782940105","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zg055600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}