{"product_id":"carrier-pg9mab036040lbsa-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for PG9MAB036040LBSA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG9MAB036040LBSA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e, updated successor \u003cstrong\u003eHT680054\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier PG9MAB036040LBSA\u003c\/strong\u003e gas furnace. Its job is to convert 120V AC line voltage down to 24V AC to power all low-voltage control circuits — including the thermostat, ignition board, gas valve, and safety switches. When this transformer fails, the entire control circuit goes dark: the thermostat shows no response, the furnace won't attempt ignition, and no error codes appear because there's simply no power to run them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC (compatible 110–125V AC range) | Output: 24V AC | Rating: 40VA | Mounting: Foot-mount | Connection: Wire leads | Frequency: 60Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier PG9MAB036040LBSA control board. Undersized or off-tolerance generic units can overheat, trip thermal cutoffs, or cause erratic low-voltage behavior that mimics board or thermostat failure — wasting time and money chasing the wrong fault.\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 screwdriver, needle-nose pliers, multimeter (verify 0V before touching leads). Label or photograph all wire connections before removal. The foot-mount bracket lines up directly with the original mounting holes for a clean swap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM warranty against defects. Ships same business day from our warehouse — order by 3PM local time to go out today.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility Note:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePG9MAB036040LBSA\u003c\/strong\u003e gas furnace. This part also carries cross-reference numbers HT01BC116B, HT01BC115, HT01BB126, HT01CT120, HT01BC120, and HT01AW115 — confirm your existing transformer's input\/output voltage and VA rating on the data plate before ordering. Need fitment confirmation? Our HVAC parts team verifies compatibility before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642199003507,"sku":"CARRIE-PG9MAB036040LBSA-TRANSFORMER-HT01BC116","price":59.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642199036275,"sku":"CARRIE-PG9MAB036040LBSA-TRANSFORMER-HT01BC116-GEN","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_e02adb67-0198-41ba-9e55-6b8dbea87538.jpg?v=1775016284","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9mab036040lbsa-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}