{"product_id":"carrier-pg8daa048095acja-transformer-h2usbz","title":"OEM Carrier 40VA Control Transformer 120V–24V for PG8DAA048095ACJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG8DAA048095ACJA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number HT01BC116, superseded by HT680054) is the factory-specified replacement for the \u003cstrong\u003eCarrier PG8DAA048095ACJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, the furnace goes completely dark: no thermostat response, no ignition attempt, nothing. A failed transformer is one of the most commonly misdiagnosed no-heat calls, so always verify 24V output at the R and C terminals before condemning other components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V secondary | 40VA rating | 50\/60 Hz | Single-phase | Foot-mount configuration | Wire lead connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit meets exact Carrier factory tolerances for VA output and insulation class. Generic transformers often run under-rated VA, causing voltage sag that triggers nuisance lockouts on sensitive control boards and gas valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and verify zero voltage before disconnecting leads. Tools needed: flathead and Phillips screwdriver, multimeter, needle-nose pliers. Photograph all wiring before removal. Always check for a blown 3A inline fuse on the secondary — a shorted low-voltage circuit will immediately blow a new transformer if the fault is not cleared first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse on all in-stock orders.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Directly fits Carrier model \u003cstrong\u003ePG8DAA048095ACJA\u003c\/strong\u003e gas furnaces. OEM part HT01BC116 has been superseded by HT680054 — both part numbers are fulfilled with the current production unit. Also cross-references: HT01BC115, HT01BC120, HT01BB126, HT01AW115, 322666-701, and B1810113. Verify primary voltage on your unit's data plate before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643232964979,"sku":"CARRIE-PG8DAA048095ACJA-TRANSFORMER-HT01BC116","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643232997747,"sku":"CARRIE-PG8DAA048095ACJA-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_b414ca1d-6641-40fc-9c16-f906221c2e66.jpg?v=1775016215","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8daa048095acja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}