{"product_id":"icp-transformer-for-waha18054a1-208-230v-to-24v-40va-ships-today","title":"ICP Transformer for WAHA18054A1 — 208\/230V to 24V 40VA | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM control transformer (part number 1173844) for the ICP\/Tempstar\/Heil WAHA18054A1 system. The transformer steps down line voltage of 208\/230 volts to the 24-volt control circuit voltage that powers your thermostat, contactor coils, relays, and control board. It is rated at 40VA, providing ample capacity for the low-voltage control loads in this air handler\/heat pump platform. When a control transformer fails, the entire low-voltage circuit goes dead — the thermostat screen goes blank, the contactor will not pull in, and the system will not start a heating or cooling cycle even though high-voltage power is present.\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\u003e1173844\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\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered as the factory replacement for the ICP\/Tempstar\/Heil WAHA18054A1 and related Comfortmaker-family equipment that uses a 208\/230V primary, 24V secondary, 40VA control transformer. Always confirm your existing transformer's primary and secondary voltage and VA rating against the specs above before installing.\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 breaker and disconnect switch, then verify zero voltage with a multimeter before touching any wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to expose the control compartment.\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 primary (line) and secondary (24V) leads, then unbolt the failed transformer from its mounting bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, reconnecting the primary leads to line voltage and the secondary leads to the 24V control circuit per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify 24V across the secondary terminals, then confirm the thermostat and contactor energize normally.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBlank thermostat with no low-voltage power present\u003c\/li\u003e\n\u003cli\u003eContactor or control board will not energize despite line power\u003c\/li\u003e\n\u003cli\u003eNo 24V reading across the transformer secondary\u003c\/li\u003e\n\u003cli\u003eBurnt smell, blown internal fuse, or visibly scorched transformer housing\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":63021622165875,"sku":"1173844","price":37.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047728562547,"sku":"1173844-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-1173844_67338093-740b-4ffc-bfb0-9e0c1b85fa2f.jpg?v=1782896176","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-waha18054a1-208-230v-to-24v-40va-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}