{"product_id":"carrier-pg9maa048100aaka-transformer-h2usbz","title":"OEM Carrier 40VA Furnace Control Transformer for PG9MAA048100AAKA","description":"\u003cdiv class=\"product-content\"\u003e\n\u003ch1\u003eOEM Carrier 40VA Furnace Control Transformer for PG9MAA048100AAKA\u003c\/h1\u003e\n\u003cp\u003eThe control transformer steps your home's 120-volt line power down to the 24-volt control voltage that runs the thermostat, gas valve, control board relays, and inducer circuit on the PG9MAA048100AAKA. Nearly every low-voltage command in the furnace depends on it. When a transformer fails — usually an open primary or a shorted winding after a control short or power surge — the entire furnace goes dead: no thermostat display, no inducer, no ignition, and no response when you call for heat. Homeowners often mistake a blown transformer for a dead thermostat or a tripped breaker because there is simply no sign of life.\n\nThis OEM transformer is a 40VA unit with a 120V primary and a 24V secondary — the rating Carrier specs for this furnace's combined control load. Many versions include the integral circuit breaker or fuse link that protects the secondary from a wiring short at the gas valve or thermostat.\n\nWhy OEM matters here: a transformer that is undersized in VA runs hot and fails early when the inducer and gas valve energize together, and a secondary voltage that drifts out of spec causes weak relay pull-in and chattering contacts on the control board. The OEM unit holds a clean 24V under full load so every downstream component sees stable control voltage.\n\nInstall difficulty: 3 of 5. Tools: 1\/4\" and 5\/16\" nut drivers, a wire stripper\/crimper for spade or screw terminals, and a multimeter to confirm 120V in and 24V out. #1 safety warning: kill the furnace breaker at the panel before touching the primary leads — the line side carries full 120V and can shock or arc.\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 PG9MAA048100AAKA. 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":62642347475315,"sku":"CARRIE-PG9MAA048100AAKA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642347508083,"sku":"CARRIE-PG9MAA048100AAKA-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_bdacccb2-b759-4959-904f-21f95ec92f42.jpg?v=1782899568","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9maa048100aaka-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}