{"product_id":"carrier-pg8jaa024070aaja-transformer-h2usbz","title":"OEM Carrier 40VA Control Transformer for PG8JAA024070AAJA Unit","description":"\u003cdiv class=\"product-content\"\u003e\n\u003ch1\u003eOEM Carrier 40VA Control Transformer for PG8JAA024070AAJA Unit\u003c\/h1\u003e\n\u003cp\u003eThe control transformer is the power supply at the heart of your Carrier PG8JAA package unit. It steps the incoming 120\/240V line voltage down to the 24V low-voltage circuit that powers your thermostat, gas valve, igniter, contactor, and the relays on the control board. When the transformer fails — usually from a shorted secondary winding, an overloaded control circuit, or simple age — the entire control side goes dead. Homeowners notice a blank thermostat, no response on a call for heat or cool, no click or hum from the contactor, and often a blown low-voltage fuse on the board. A faint buzzing sound or a visibly scorched, melted-smelling housing confirms the diagnosis.\n\nThis is a 40VA Class II transformer with a 120\/240V dual primary and a 24VAC secondary, using Carrier's color-coded leads so it drops straight into the factory wiring diagram. The VA rating matters: it must supply enough current to pull in the gas valve and contactor simultaneously without sagging below 24V.\n\nGenuine OEM matters here because aftermarket transformers are frequently built to a lower VA rating or looser voltage tolerance. An under-rated unit sags under load, causing the gas valve to chatter or the contactor to drop out mid-cycle, and it runs hot until it fails again prematurely. The OEM part is matched to the actual current draw of this furnace's controls.\n\nInstall difficulty: 2 of 5. Tools: 1\/4\" nut driver, multimeter, wire nuts or factory connectors. SAFETY: Kill the unit's disconnect and the main breaker before touching any wiring — the primary side carries lethal line voltage.\n\nShips same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model PG8JAA024070AAJA. Always verify the part number against your unit's data plate before ordering.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose OEM?\u003c\/h2\u003e\n\u003cp\u003eOEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.\u003c\/p\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643219890547,"sku":"CARRIE-PG8JAA024070AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643219923315,"sku":"CARRIE-PG8JAA024070AAJA-TRANSFORMER-HT01BC116-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BC116_17f487bb-2591-4ae3-b570-c588b7763bb7.jpg?v=1782899529","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8jaa024070aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}