{"product_id":"carrier-ph3gnaa24000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH3GNAA24000AA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD242 for Model PH3GNAA24000AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD242) is the factory-specified 24V control circuit transformer for the \u003cstrong\u003eCarrier PH3GNAA24000AA\u003c\/strong\u003e packaged unit. The transformer steps down high-voltage line power (208\/240\/480V primary) to the 24V AC signal that energizes your thermostat, contactor coil, gas valve, and all control board logic. When this transformer fails, the entire control circuit goes dead — the system will not respond to any thermostat call, nothing will energize, and you may measure 0V across the 24V secondary terminals. It is one of the first components to check on a completely unresponsive unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA rating | Primary: 208\/240\/480V | Secondary: 24VAC | 50\/60Hz | Foot-mount configuration | OEM part #HT01BD242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier factory part, wound to exact VA and voltage tolerances. Generic transformers with loose VA ratings can cause nuisance tripping of downstream fuses and unstable contactor operation — OEM ensures factory-matched performance and longevity.\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 touching any wiring. Tools needed: flathead and Phillips screwdriver, multimeter, wire stripper. Photograph all wiring connections before removal. Confirm secondary output reads 24–28VAC after installation before closing the cabinet.\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 before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PH3GNAA24000AA\u003c\/strong\u003e packaged unit. This transformer also crosses to Bryant, Payne, and ICP family equipment sharing the HT01BD242 specification — always verify primary voltage (208\/240\/480V) and VA rating (75VA) on your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641367515507,"sku":"CARRIE-PH3GNAA24000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641367548275,"sku":"CARRIE-PH3GNAA24000AA-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_44dd30c9-d228-4b69-a299-b9185e201aae.jpg?v=1782943273","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gnaa24000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}