{"product_id":"carrier-pg9maa024040aeka-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for PG9MAA024040AEKA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG9MAA024040AEKA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number HT01BC116 \/ superseded by HT680054) is the factory-specified replacement for the \u003cstrong\u003eCarrier PG9MAA024040AEKA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, nothing responds: the thermostat goes dark, the furnace won't call for heat, and diagnostics show no 24V signal at the board. A failed transformer is one of the most misdiagnosed furnace problems, often confused with a bad control board or thermostat.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V AC primary | 24V AC secondary | 60 Hz | Foot-mount configuration | Wire lead connections | Replaces HT01BC116, HT01BC116B, HT01BC115, HT01BB126, HT680054\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA and voltage tolerances. Undersized or off-tolerance generic units can cause erratic thermostat behavior, nuisance lockouts, and premature control board failure — costing far more than the part savings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Note wire lead colors and terminal positions before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM fit for Carrier model \u003cstrong\u003ePG9MAA024040AEKA\u003c\/strong\u003e gas furnace. Note that OEM part number HT01BC116 has been superseded by HT680054 — both are the same factory-spec 40VA 120V\/24V transformer. Verify your unit's data plate voltage and VA rating before ordering. Our parts team is available to confirm fitment before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642446139763,"sku":"CARRIE-PG9MAA024040AEKA-TRANSFORMER-HT01BC116","price":70.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642446172531,"sku":"CARRIE-PG9MAA024040AEKA-TRANSFORMER-HT01BC116-GEN","price":62.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_2d9d0314-fb0a-4aba-9e6b-66ae32b8b919.jpg?v=1775016273","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9maa024040aeka-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}