{"product_id":"carrier-py2pnb024060aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY2PNB024060AA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V — Model PY2PNB024060AA\u003c\/h1\u003e\u003cp\u003eThe Carrier \u003cstrong\u003eHT01BD209\u003c\/strong\u003e is the factory-specified OEM control transformer for the \u003cstrong\u003ePY2PNB024060AA\u003c\/strong\u003e packaged unit. Its job is fundamental: step down 208\/240V line voltage to the 24V signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails — due to a shorted control wire, failed component drawing excess current, or simple age — the entire control circuit goes dead. The result is a system that appears completely unresponsive: no thermostat display response, no contactor pull-in, and no call-for-heat or call-for-cool being processed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary input | 24V secondary output | 40VA power rating | 50\/60Hz compatible | Factory-matched OEM tolerances for reliable Class 2 control-circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD209 is wound to Carrier's exact VA and impedance specs. Undersized or off-tolerance aftermarket transformers can overheat, trip thermal protection, or deliver unstable 24V — causing intermittent faults that are difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always photograph existing wiring connections before removal. Inspect all 24V control wiring for shorts before energizing the new transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for Carrier model \u003cstrong\u003ePY2PNB024060AA\u003c\/strong\u003e. Verify primary voltage (208V or 240V) matches your supply before ordering — this transformer supports both taps. Not sure it fits? Our HVAC parts specialists verify fitment before you buy. Order now and get same-day shipping on in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640551395699,"sku":"CARRIE-PY2PNB024060AA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640551428467,"sku":"CARRIE-PY2PNB024060AA-TRANSFORMER-HT01BD209-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-HT01BD209_a4a88c76-ba5a-46f8-aa29-c1c4987e9761.jpg?v=1782942286","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb024060aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}