{"product_id":"carrier-pg8uaa042091acja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V-24V for PG8UAA042091ACJA","description":"\u003ch1\u003eOEM Carrier 40VA 120V–24V Step-Down Transformer HT01BC116 for Model PG8UAA042091ACJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM step-down transformer for the \u003cstrong\u003eCarrier PG8UAA042091ACJA\u003c\/strong\u003e gas furnace, sold under OEM part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e (superseded by HT680054). The transformer converts 120V line voltage to 24V AC to power all low-voltage control circuit components — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace loses all 24V control signal: the thermostat goes blank, the system won't call for heat, and no safety functions respond. It's one of the first components to check when you have a completely unresponsive furnace.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary | 24V secondary | 60 Hz single-phase | Foot-mount style | Wire lead connections with insulated female quick-connects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM-spec unit is factory-matched to the control board's load requirements. Generic transformers frequently run undersized VA tolerance or use inferior core materials, leading to overheating, voltage sag, and premature failure — particularly when the furnace is paired with a central AC system sharing the same 24V circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify 0V before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Photograph all wire connections before disconnecting. Check between the C and R terminals on the control board after installation to confirm 24V output.\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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the direct OEM replacement for Carrier model \u003cstrong\u003ePG8UAA042091ACJA\u003c\/strong\u003e gas furnaces. Note: OEM part number HT01BC116 has been factory-superseded by HT680054 — both are genuine Carrier authorized parts and direct drop-in replacements. Also replaces HT01BC115, HT01BB126, HT01CT120, HT01BC120, and related cross-reference numbers. Confirm your unit's control voltage requirement on the data plate before ordering. Our team is happy to verify fitment — reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642758713715,"sku":"CARRIE-PG8UAA042091ACJA-TRANSFORMER-HT01BC116","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642758746483,"sku":"CARRIE-PG8UAA042091ACJA-TRANSFORMER-HT01BC116-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_50a38127-fb3c-404b-98bb-304dcbaa9fb2.jpg?v=1775041272","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8uaa042091acja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}