{"product_id":"icp-40va-transformer-for-wja424000ktp0a1-208-230v-to-24v-ships-today-1","title":"ICP 40VA Transformer for WJA424000KTP0A1 – 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM control transformer kit (OEM part numbers 1173691 transformer and 1176032 terminal barrier) for the ICP WJA424000KTP0A1 system. The transformer steps the 208\/230V line voltage down to the 24V control voltage that powers the thermostat, contactor coil, relays, and control board. Rated at 40VA, it supplies the low-voltage circuit for the entire system. The included 24V barrier protects and isolates the secondary terminals. When the transformer fails, the 24V circuit goes dead — the thermostat blanks, the contactor won't pull in, and the system won't respond to a call. Specs: 40VA, 208\/230V primary, 24V secondary, with terminal barrier.\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), 1176032 (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 \/ 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 \/ 230 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect-fit replacement for the ICP\/Tempstar\/Heil WJA424000KTP0A1 system and other ICP-family units that specify the 40VA 208\/230-to-24V transformer 1173691 with barrier 1176032. Confirm the VA rating and primary voltage tap against your existing transformer before ordering.\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 breaker and verify zero voltage with a multimeter before opening the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e – Remove the service panel to expose the transformer and low-voltage terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e – Photograph the primary tap wiring and all secondary connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Disconnect the primary and secondary leads, then unmount the old transformer and barrier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Mount the new transformer, install the 24V barrier, and reconnect the correct primary tap (208 or 230V) and the 24V secondary per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore power and confirm 24V across the secondary, then verify the thermostat and contactor respond.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThermostat is blank or unpowered with line voltage present.\u003c\/li\u003e\n\u003cli\u003eNo 24V reading across the transformer secondary.\u003c\/li\u003e\n\u003cli\u003eContactor and relays won't energize on a call.\u003c\/li\u003e\n\u003cli\u003eBurnt smell, discoloration, or an open primary\/secondary winding.\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":63027232178547,"sku":"1176032-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047958233459,"sku":"1176032","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176032_0b205359-2eb5-4e27-b0f0-2ea4c5fcb46b.jpg?v=1782882937","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wja424000ktp0a1-208-230v-to-24v-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}