{"product_id":"icp-transformer-for-waxm604a1-40va-208-230v-to-24v-ships-today","title":"ICP Transformer for WAXM604A1 — 40VA 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer (part number 1172028) is the 24V power source for the ICP WAXM604A1 air handler. It steps down the incoming 208\/230V line voltage to the 24V low-voltage power required by the thermostat, control board, contactor coils, and safety circuits. Rated at 40VA, it supplies enough current to drive the typical low-voltage load of the unit. When a transformer fails, the entire low-voltage control system goes dead: the thermostat screen blanks, the blower and compressor will not energize, and no 24V is present across the R and C terminals. Failures are usually caused by a shorted control wire, a seized contactor coil, or age-related insulation breakdown that opens the internal thermal fuse.\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 Number\u003c\/td\u003e\n\u003ctd\u003e1172028\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eClass 2 Step-Down Control Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP\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\u003eRating\u003c\/td\u003e\n\u003ctd\u003e40VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM Replacement\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 OEM fit for the ICP WAXM604A1 and compatible Tempstar and Heil air handlers using the 1172028 transformer. Always confirm the primary voltage matches your unit's incoming supply (208\/230V) 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 breaker and verify zero voltage with a multimeter at the unit's line terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to expose the control board and transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary and secondary wire connections before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, reconnect primary to the matching 208\/230V tap and secondary to the 24V circuit per your photos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V across the R and C terminals; verify the thermostat powers up and the unit responds to a call for heat or cool.\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 output at the secondary terminals while line voltage is present.\u003c\/li\u003e\n\u003cli\u003eDead thermostat and no response from blower or compressor.\u003c\/li\u003e\n\u003cli\u003eBurnt smell or visibly scorched transformer housing.\u003c\/li\u003e\n\u003cli\u003eRepeated control-fuse blowouts traced back to the transformer.\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":63021610598771,"sku":"1172028","price":33.8,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047735869811,"sku":"1172028-GEN","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172028_f19b4a7d-e9ab-4944-ab40-312f9c37a22e.jpg?v=1782896365","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-waxm604a1-40va-208-230v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}