{"product_id":"carrier-py3gna036090ab-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/230V for PY3GNA036090AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V — HT01BD209 for Model PY3GNA036090AB\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part # HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNA036090AB\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (208\/230V primary) to the 24V control circuit voltage that powers your thermostat, contactor coil, gas valve, and all low-voltage controls. When this transformer fails, nothing in the control system responds — the unit will not start, the thermostat goes dead, and no fault codes will display because the board itself loses power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary input | 24V secondary output | 40VA rated | 50\/60 Hz | Class 2 control transformer | Replaces HT01BD207, HT01CN232, 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This genuine Carrier OEM part is wound to exact factory VA and voltage tolerances. Under-rated or off-brand transformers are a leading cause of repeated low-voltage fuse failures and nuisance lockouts — an OEM replacement eliminates that risk entirely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: multimeter (to verify 24V output post-install), flathead and Phillips screwdrivers, wire strippers, needle-nose pliers. Always photograph existing wiring connections before removing the old unit. Check for a blown 3A or 5A low-voltage fuse — a shorted control wire may have caused the original failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier PY3GNA036090AB\u003c\/strong\u003e packaged units. Verify your unit's data plate shows 208\/230V supply voltage before ordering. Cross-references OEM part numbers HT01BD207, HT01CN232, and 4000A46E07AE28. Have questions about fit? Our HVAC parts specialists confirm compatibility before you order — contact us today and get your unit back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640480551283,"sku":"CARRIE-PY3GNA036090AB-TRANSFORMER-HT01BD209","price":87.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640480584051,"sku":"CARRIE-PY3GNA036090AB-TRANSFORMER-HT01BD209-GEN","price":77.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_221496b9-afc7-4faa-912e-8341c174191e.jpg?v=1775025421","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna036090ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}