{"product_id":"carrier-pg8uaa036045adja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for PG8UAA036045ADJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG8UAA036045ADJA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG8UAA036045ADJA\u003c\/strong\u003e gas furnace. Part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e (superseded by HT680054) steps down 120V line voltage to 24V AC, powering every low-voltage component in your furnace and air conditioning system — including the thermostat, gas valve, control board, and contactor. When this transformer fails, the entire control circuit goes dead: no thermostat response, no ignition sequence, and no heat. If you're measuring 120V on the primary side but zero volts on the secondary, this transformer is your culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V AC primary (110–125V range) | 24V AC secondary | Foot-mount configuration | Wire lead connections | 60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance aftermarket transformers can cause nuisance lockouts, board damage, or premature failure of downstream low-voltage components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching leads). Label and photograph all wire connections before removal. Torque terminal screws firmly — loose low-voltage connections are a leading callback cause.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 Engineered for Carrier model \u003cstrong\u003ePG8UAA036045ADJA\u003c\/strong\u003e gas furnaces. Note that OEM part number HT01BC116 has been superseded by HT680054 — both are the same 40VA, 120V–24V transformer. Cross-references include HT01BC115, HT01BC116B, HT01BB126, and HT01BC120. Verify your existing transformer's primary voltage and VA rating against your unit's data plate before ordering. Have a question about fitment? Our team confirms compatibility before you buy — ships same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642801443187,"sku":"CARRIE-PG8UAA036045ADJA-TRANSFORMER-HT01BC116","price":65.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642801475955,"sku":"CARRIE-PG8UAA036045ADJA-TRANSFORMER-HT01BC116-GEN","price":57.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_631c4245-82cf-4389-a2df-7d36680f08c7.jpg?v=1775016270","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8uaa036045adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}