{"product_id":"carrier-ph3zpa048000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH3ZPA048000AA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD242 for Model PH3ZPA048000AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH3ZPA048000AA\u003c\/strong\u003e packaged HVAC unit. The transformer steps down high-voltage supply power — 208, 240, or 480 volts — to the 24VAC signal that powers every component in your control circuit: the thermostat, contactor coils, gas valve, and control board. When the transformer fails, the result is total control-circuit silence — nothing responds, nothing runs. A failed transformer is often misdiagnosed as a board failure, making correct identification critical before ordering additional parts.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA power rating | Input: 208\/240\/480V primary | Output: 24VAC secondary | Frequency: 50\/60Hz | Foot-mount configuration | OEM part #HT01BD242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact VA and voltage tolerances. Generic transformers frequently run under-rated VA, causing premature overheating, nuisance tripping on the internal fuse, and shortened service life — especially in commercial packaged units with high 24V circuit loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires lockout\/tagout of high-voltage supply before beginning. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter (verify 24VAC output after install), and needle-nose pliers. Label all low-voltage wires before disconnecting. Foot-mount bracket must be secured before reconnecting supply wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered by cutoff time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier PH3ZPA048000AA\u003c\/strong\u003e packaged units. This transformer is also used across multiple Carrier, Bryant, and Payne packaged and split-system platforms — always verify your unit's data plate voltage configuration (208V, 240V, or 480V primary) matches your supply circuit before installation. Have a fitment question? Our HVAC parts specialists verify compatibility before you order — contact us today and ship the same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641315447155,"sku":"CARRIE-PH3ZPA048000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641315479923,"sku":"CARRIE-PH3ZPA048000AA-TRANSFORMER-HT01BD242-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD242_5402c50d-222f-48c8-9da1-36fb79453a9d.jpg?v=1782943312","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3zpa048000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}