{"product_id":"icp-40va-transformer-for-wpg4244040lka1-oem-208-230v-to-24v-ships-today","title":"ICP 40VA Transformer for WPG4244040LKA1 — OEM 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 40VA control transformer is the direct-fit step-down power supply for the ICP \/ Heil \/ Tempstar \/ Comfortmaker WPG4244040LKA1 furnace. It converts the 208\/230V line input to the 24V secondary that powers the control board, thermostat, gas valve, and relays. Covered OEM part numbers: 1173691 (Trans 208\/230\u0026gt;24 40VA) and 1178431 (Barrier 24V). When a transformer fails — from a shorted secondary, an overloaded VA draw, or a power surge — the entire 24V control circuit goes dead, leaving the furnace completely unresponsive with a blank board and no thermostat call. This direct replacement restores stable 24V control power.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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\u003eStep-Down Control Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Heil \/ Tempstar \/ Comfortmaker\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\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt for the WPG4244040LKA1 and used across matching ICP-built furnaces sold under the Heil, Tempstar, Comfortmaker, and Arcoaire names. Confirm the VA rating and primary\/secondary voltages against the failed transformer before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the switch and breaker; 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 their terminal positions before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, remove the mounting screws, and lift out the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer and reconnect primary and secondary leads per your photo, observing the correct voltage tap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm 24V across the secondary with a meter, and verify the control board and thermostat respond.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompletely dead furnace — no control board lights, no thermostat response\u003c\/li\u003e\n\u003cli\u003eNo measurable 24V on the secondary terminals\u003c\/li\u003e\n\u003cli\u003eBurnt smell, melted housing, or scorched windings\u003c\/li\u003e\n\u003cli\u003eRepeated low-voltage fuse blowing on the control board\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63021520060787,"sku":"1178431","price":37.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047388856691,"sku":"1178431-GEN","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1178431_3c6a89d2-fbf2-4ff3-8925-6ef1414e5674.jpg?v=1782883278","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wpg4244040lka1-oem-208-230v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}