{"product_id":"carrier-pg9mab036080aasa-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for PG9MAB036080AASA — HT01BC116","description":"\u003ch1\u003eOEM Carrier 40VA Transformer 120V–24V for Model PG9MAB036080AASA (HT01BC116 \/ HT680054)\u003c\/h1\u003e\u003cp\u003eThis OEM control-circuit transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG9MAB036080AASA\u003c\/strong\u003e gas furnace. It steps down 120V line voltage to the 24V AC signal that powers your thermostat, gas valve, control board relays, and all low-voltage switching circuits. When the transformer fails — due to a shorted low-voltage wire, a failed component drawing excess current, or simple age — the entire control circuit goes dead: the thermostat goes blank, the furnace will not respond to any call for heat, and no error codes will flash because there is no power to display them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | 60 Hz | Foot-mount configuration | Wire lead connections | Integrated 3A fuse protection on select configurations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM-grade replacement (current superseding part HT680054) sourced from Carrier's factory-authorized supply chain. Generic transformers are frequently wound to looser VA tolerances and may not maintain stable 24V output under load, causing nuisance lockouts and premature board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and confirm 0V with a multimeter before touching any wiring. Label or photograph all wire connections before disconnecting. Tools needed: flat-head screwdriver, needle-nose pliers, multimeter. Before replacing the transformer, check for shorted low-voltage wiring — a wiring fault will blow the new transformer immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PG9MAB036080AASA\u003c\/strong\u003e gas furnace and cross-references to a wide range of Carrier, Bryant, and Payne furnace models using the HT01BC116 or HT680054 transformer. Also supersedes part numbers HT01BC115, HT01BB126, HT01CT120, HT01BC120, and HT01AW115. Always verify primary\/secondary voltage and VA rating on your unit's data plate before ordering. Our team is happy to confirm fitment — just reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642167349619,"sku":"CARRIE-PG9MAB036080AASA-TRANSFORMER-HT01BC116","price":67.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642167382387,"sku":"CARRIE-PG9MAB036080AASA-TRANSFORMER-HT01BC116-GEN","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_c7e520ca-ff6e-4240-9a78-1cba17971df1.jpg?v=1775016287","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9mab036080aasa-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}