{"product_id":"carrier-pf4mna030000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA030000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNA030000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM control transformer for the \u003cstrong\u003eCarrier PF4MNA030000AAAA\u003c\/strong\u003e air handler. The transformer steps line voltage (208\/230V primary) down to the 24V signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When it fails, the entire control circuit goes dark — you'll find a completely unresponsive thermostat, a tripped 3A fuse, or a system that won't call for heating or cooling at all despite power being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA power rating | 208\/230V primary input | 24V secondary output | Direct OEM drop-in replacement | Part number HT01CN241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part engineered to exact specification. Generic transformers often use undersized windings that run hot, blow fuses repeatedly, and fail within one season — costing far more in callbacks than the modest price difference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wire connections before removal. The transformer mounts to the blower compartment panel and connects via quick-connect spade terminals on most configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer's warranty. In-stock units ship same business day when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier PF4MNA030000AAAA\u003c\/strong\u003e air handler. Verify your unit's data plate shows a 208\/230V primary and 24V secondary control circuit before ordering. If you are unsure of fitment, our parts specialists can verify compatibility before you purchase — contact us before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643310100851,"sku":"CARRIE-PF4MNA030000AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643310133619,"sku":"CARRIE-PF4MNA030000AAAA-TRANSFORMER-HT01CN241-GEN","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN241_151f5db1-c7be-4cde-bcb2-2096ee61f090.jpg?v=1775041561","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna030000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}