{"product_id":"carrier-pg8jaa024045aaja-transformer-h2usbz","title":"OEM Carrier Furnace Transformer 40VA 120V-24V for PG8JAA024045AAJA","description":"\u003ch1\u003eOEM Carrier Furnace Control Transformer 40VA 120V–24V for Model PG8JAA024045AAJA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM step-down transformer for the \u003cstrong\u003eCarrier PG8JAA024045AAJA\u003c\/strong\u003e gas furnace, sold under OEM part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e (current superseding OEM part: HT680054). The transformer is the heartbeat of your furnace's low-voltage control circuit — it steps 120V line power down to 24V AC to energize the thermostat, control board, gas valve, and every relay in the system. When it fails, \u003cem\u003enothing works\u003c\/em\u003e: the thermostat goes blank, the system is completely unresponsive, and you may measure 0V between the R and C terminals on the control board. A blown fuse or shorted low-voltage wiring is often the root cause, so always inspect the wiring harness before condemning the transformer.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 120V AC primary | 24V AC secondary | 50\/60 Hz single-phase | Foot-mount bracket | Wire lead connections with insulated female quick-connects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA tolerances, preventing nuisance overloads that trip thermal protection. Generic units frequently run under-rated VA, causing premature burnout — especially on systems with zone valves or multiple thermostats drawing continuous current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off the furnace disconnect and confirm 0V at the transformer primary before touching any wiring. Tools needed: multimeter, 1\/4\" nut driver, needle-nose pliers. Photograph all wiring connections before disconnecting. Check for a short on the 24V secondary circuit before energizing the new transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered by 5 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePG8JAA024045AAJA\u003c\/strong\u003e gas furnace. Also cross-references HT680054, HT01BC115, HT01BB126, HT01CT120, HT01BC120, and HT01AW115 — confirm your existing transformer's primary\/secondary voltage and VA rating on its nameplate before ordering. Our parts specialists verify fitment at no charge — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643226083699,"sku":"CARRIE-PG8JAA024045AAJA-TRANSFORMER-HT01BC116","price":52.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643226116467,"sku":"CARRIE-PG8JAA024045AAJA-TRANSFORMER-HT01BC116-GEN","price":45.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_a21e8636-5e58-41e1-88e9-5193b2991b9f.jpg?v=1775031679","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8jaa024045aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}