{"product_id":"carrier-pg8uaa024045adja-transformer-h2usbz","title":"OEM Carrier Control 40VA Transformer HT01BL228 for PG8UAA024045ADJA","description":"\u003cdiv class=\"product-content\"\u003e\n\u003ch1\u003eOEM Carrier Control Transformer HT01BL228 for PG8UAA024045ADJA\u003c\/h1\u003e\n\u003cp\u003eThe HT01BL228 control transformer steps the 120-volt line power in your Carrier PG8UAA024045ADJA packaged gas unit down to the 24-volt control voltage that runs the thermostat, gas valve, relays, and integrated furnace control. Nearly every low-voltage function depends on it. When a transformer fails — usually from a shorted gas valve, a pinched thermostat wire, or simple age — the entire control circuit goes dead: blank thermostat, no response to a heat or cool call, no inducer, no ignition. A transformer failing under load may hum loudly, run hot to the touch, or repeatedly blow the control board's 3-amp fuse moments after power-up.\n\nSpecs: this is a Class 2, 40VA transformer with a 120V primary and a 24V (nominal) secondary, foot-mounted with color-coded leads. The 40VA rating provides the inrush headroom the gas valve and relay coils require; undersizing causes voltage sag that drops out relays mid-cycle.\n\nWhy OEM matters: cheap aftermarket transformers are often wound to a lower VA rating than advertised or use thinner magnet wire that overheats under continuous control load. A weak transformer sags below the ~18V holding voltage of the gas valve and relays, producing maddening intermittent dropouts that are easy to misdiagnose as a bad board. The genuine HT01BL228 is wound to Carrier's full 40VA spec for stable holding voltage.\n\nInstall difficulty: 2 of 5. Tools: 1\/4\" and 5\/16\" nut drivers, wire strippers, and a multimeter to confirm 24V across the secondary after installation. SAFETY: kill the breaker to the unit — the primary side carries live 120V, and nearby capacitors can hold a charge.\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 PG8UAA024045ADJA. 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":62642845974899,"sku":"CARRIE-PG8UAA024045ADJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642846007667,"sku":"CARRIE-PG8UAA024045ADJA-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_9a579816-b7de-4957-9799-8d09e274aac7.jpg?v=1782908212","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8uaa024045adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}