{"product_id":"icp-40va-transformer-for-waht604a2-208-230v-to-24v-ships-today","title":"ICP 40VA Transformer for WAHT604A2 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis genuine OEM control transformer (part number 1172028) for the ICP \/ Tempstar \/ Heil WAHT604A2 air handler steps 208\/230 volts of line power down to a 24-volt, 40VA control output. That low-voltage power feeds the thermostat, fan coil control board, relays, and safety circuits. A 40VA rating provides enough capacity for the control board, blower relay, and a typical thermostat load. When this transformer fails — from an internal short, overload, or age — the unit loses all low-voltage control: the thermostat goes dark and the blower will not energize on a heating or cooling call. Typical symptoms include a dead thermostat, a buzzing transformer, repeatedly blown fuses, and a burnt odor in the control compartment.\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\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWAHT604A2\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\u003eA direct OEM replacement for the ICP \/ Tempstar \/ Heil WAHT604A2 air handler and related ICP units using the 208\/230V-to-24V 40VA control platform. Verify the 1172028 part number on your existing transformer for an exact match 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the air handler service panel to reach the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary and secondary wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Confirm the 208\/230V primary tap is wired correctly, label the leads, disconnect, and unbolt the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 40VA transformer, matching the primary lead to your incoming line voltage, and reconnect per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify 24V across the secondary and normal blower\/thermostat operation.\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 unresponsive\u003c\/li\u003e\n\u003cli\u003eLow-voltage fuse blows repeatedly\u003c\/li\u003e\n\u003cli\u003eLoud humming or buzzing from the transformer\u003c\/li\u003e\n\u003cli\u003eBurnt smell or scorch marks on the transformer housing\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":63021615841651,"sku":"1172028-GEN","price":28.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047953449331,"sku":"1172028","price":37.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172028_0c246ee6-3c66-41cf-8307-937fff85fac7.jpg?v=1782882557","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-waht604a2-208-230v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}