{"product_id":"icp-40va-transformer-for-wfel070b036a1-120-24v-oem-furnace-transformer-ships-today-1","title":"ICP 40VA Transformer for WFEL070B036A1 — 120\/24V OEM Furnace Transformer | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM 40VA control transformer (part 1177217) steps 120V line power down to the 24V control voltage that powers the ICP Tempstar\/Heil WFEL070B036A1 furnace's thermostat, gas valve, relays, and control board logic. Rated at 40VA with a 120V primary and 24V secondary, it is the foundation of the low-voltage control circuit. When the transformer fails — usually from a shorted secondary, an overloaded accessory, or simple age — the entire 24V system goes dead: no thermostat call, no ignition, no cooling. A blown transformer is a frequent root cause behind a furnace that appears completely unresponsive.\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 Number\u003c\/td\u003e\n\u003ctd\u003e1177217\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\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\u003e120V\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Tempstar \/ Heil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt for the ICP Tempstar\/Heil WFEL070B036A1 furnace and shared ICP-family controls using the 40VA 120\/24V transformer. Confirm primary voltage and VA rating against your existing unit 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 (line) and secondary (24V) lead connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, remove the transformer mounting screw or bracket, and lift out the failed unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 1177217 transformer, reconnect the 120V primary and 24V secondary leads exactly per your photos, and secure all connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm ~24V at the secondary and a normal thermostat call\/ignition sequence.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace completely unresponsive — no 24V control power.\u003c\/li\u003e\n\u003cli\u003eNo voltage at the thermostat or gas valve terminals.\u003c\/li\u003e\n\u003cli\u003eTransformer is hot, buzzing, or smells burnt.\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse 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":"Direct Replacement","offer_id":63027245613427,"sku":"1177217-GEN","price":29.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047955284339,"sku":"1177217","price":38.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1177217_e2f03ac2-b026-48c5-a690-bfcd19d0c570.jpg?v=1782882692","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wfel070b036a1-120-24v-oem-furnace-transformer-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}