{"product_id":"icp-40va-transformer-for-wpg4484130lka1-208-230-to-24v-oem-1173691-ships-today-1","title":"ICP 40VA Transformer for WPG4484130LKA1 — 208\/230 to 24V OEM 1173691 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 40VA control transformer (part 1173691, \"TRANS 208\/230\u0026gt;24 40VA\") with its 24V barrier (part 1178431) steps the 208\/230V line voltage down to the 24V control circuit on the ICP Tempstar Heil WPG4484130LKA1. Every low-voltage component — the thermostat, gas valve, relays, and control board logic — depends on clean 24VAC from this transformer. When it fails or shorts, the entire control circuit goes dead: no thermostat response, no ignition, and often a blown low-voltage fuse on the board. A correctly rated 40VA transformer restores stable control power without overloading.\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, 1178431\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl 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\u003eBuilt for the ICP \/ Tempstar \/ Heil WPG4484130LKA1 and other ICP-family units using the 1173691 transformer and 1178431 barrier. Confirm primary voltage tap and VA rating 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 disconnect and breaker, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary and secondary leads and the voltage tap in use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect all leads, unbolt the transformer and barrier from the mounting bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, install the 24V barrier, and reconnect leads to the matching primary tap and 24V secondary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24VAC at the secondary and normal thermostat operation.\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 power; thermostat and system are unresponsive.\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage control fuse.\u003c\/li\u003e\n\u003cli\u003eTransformer is buzzing, overheated, or has a burnt smell.\u003c\/li\u003e\n\u003cli\u003eMeasured secondary voltage is missing or far below 24VAC.\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":"OEM","offer_id":63027207438707,"sku":"1178431","price":37.64,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047393673587,"sku":"1178431-GEN","price":28.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1178431_f1b6d6fa-e4f8-4d67-81c0-44d3a5722c99.jpg?v=1782883420","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wpg4484130lka1-208-230-to-24v-oem-1173691-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}