{"product_id":"icp-40va-transformer-for-wpg4604130rka1-208-230v-to-24v-ships-today-1","title":"ICP 40VA Transformer for WPG4604130RKA1 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM transformer kit (part number 1173691, with terminal barrier 1178431) supplies low-voltage control power for the ICP\/Tempstar\/Heil WPG4604130RKA1. It steps the 208\/230V primary down to a 24V, 40VA secondary that powers the control board, contactor coil, thermostat circuit, and gas valve. The included 24V barrier protects and isolates the low-voltage terminals. When a transformer fails — usually from a shorted gas valve, pinched thermostat wire, or contactor coil overload — the entire control system goes dead: no thermostat response, no contactor pull-in, and no ignition. Installing the correct 40VA OEM transformer restores stable, properly rated control voltage to the whole unit.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003e1173691 (transformer), 1178431 (24V barrier)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eStep-Down Control Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Tempstar \/ Heil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Voltage\u003c\/td\u003e\n\u003ctd\u003e208\/230V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eLow-voltage control circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eFactory-spec 40VA control transformer for the ICP\/Tempstar\/Heil WPG4604130RKA1 packaged unit and other WPG-series models using the same 208\/230V-to-24V control circuit. Verify VA rating, primary\/secondary voltages, and mounting before installing.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the unit and main panel, then verify zero voltage at the transformer leads with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-area service panel to reach the transformer and barrier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photo every primary and secondary lead and the barrier position before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, unbolt the transformer from its bracket, and set the old barrier aside.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, install the 24V barrier, and reconnect primary and secondary leads exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, measure 24V at the secondary, and confirm the thermostat, contactor, and ignition respond.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo 24V control voltage and a completely unresponsive thermostat.\u003c\/li\u003e\n\u003cli\u003eContactor will not pull in and the system will not start.\u003c\/li\u003e\n\u003cli\u003eTransformer is hot, buzzing loudly, or smells burnt.\u003c\/li\u003e\n\u003cli\u003eRepeated control-fuse blowing after a downstream short is cleared.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003eShips same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"Direct Replacement","offer_id":63027205603699,"sku":"1178431-GEN","price":34.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047965016435,"sku":"1178431","price":45.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1178431_275d3ca1-b0f1-4bba-b1e8-585a52c89159.jpg?v=1782883454","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wpg4604130rka1-208-230v-to-24v-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}