{"product_id":"carrier-pg9mab024040lbsa-transformer-h2usbz","title":"OEM Carrier Furnace Transformer 120V-24V 40VA — PG9MAB024040LBSA","description":"\u003ch1\u003eOEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG9MAB024040LBSA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG9MAB024040LBSA\u003c\/strong\u003e gas furnace, cross-referencing OEM part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, gas valve, inducer relay, and all low-voltage control circuits. When it fails, the furnace goes completely silent — no thermostat response, no inducer start, no ignition attempt — because every downstream control depends on that 24V output. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary input | 24V secondary output | 40VA rating | Wire lead connection type | 60 Hz | Foot-mount configuration — factory-matched to Carrier PG9MAB024040LBSA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and potted to exact VA and voltage tolerances, protecting sensitive control boards from voltage sag under load. Generic units frequently run under-rated VA, causing nuisance tripping of the integrated fuse and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off the 120V disconnect and verify zero voltage with a multimeter before disconnecting leads. Photograph or label all wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Check and replace the 3A inline fuse if blown — a shorted zone valve or thermostat wiring is often the root cause of transformer failure.\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 Carrier \u003cstrong\u003ePG9MAB024040LBSA\u003c\/strong\u003e gas furnace. Note: HT01BC116 has been superseded — this listing supplies the current OEM-authorized replacement meeting identical 120V\/24V\/40VA specifications. Always verify input voltage and VA rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you purchase.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642248384883,"sku":"CARRIE-PG9MAB024040LBSA-TRANSFORMER-HT01BC116","price":47.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642248417651,"sku":"CARRIE-PG9MAB024040LBSA-TRANSFORMER-HT01BC116-GEN","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_8fade482-b774-42ec-9a59-0f80f65bf55e.jpg?v=1775031526","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9mab024040lbsa-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}