{"product_id":"icp-transformer-for-wahm364a2-40va-208-230v-to-24v-step-down-ships-today","title":"ICP Transformer for WAHM364A2 - 40VA 208\/230V to 24V Step-Down | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer (part #1172028) supplies the 24V control power for your ICP WAHM364A2 fan coil air handler. It steps 208\/230V line voltage down to the 24V the thermostat, control board, and relays depend on, and its 40VA rating provides the current needed to energize the full low-voltage circuit without overheating. A failed transformer kills the entire control side at once: a blank thermostat, a dead blower, and no measurable 24V at the board. Typical causes include a shorted thermostat wire, a stuck contactor drawing excess current, a power surge, or age-related winding failure. A burnt odor or a tripped internal fuse link confirms the transformer is done.\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\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\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\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Direct 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 WAHM364A2 fan coil air handler and shared-platform Tempstar, Heil, and Comfortmaker WAHM-series units using the 208\/230V-to-24V 40VA control transformer. Verify your existing unit is rated 40VA with a 208\/230V primary and 24V secondary 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 line and 24V terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e - Remove the air handler service panel to reach the control compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e - Photograph the primary and secondary wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e - Label and disconnect the primary line leads and 24V secondary leads, then unbolt the failed transformer from its bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e - Mount the new transformer and reconnect primary and secondary exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e - Restore power and confirm 24V across the secondary plus normal thermostat and blower 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 with line power present\u003c\/li\u003e\n\u003cli\u003eNo 24V at the control board or transformer secondary\u003c\/li\u003e\n\u003cli\u003eEntire low-voltage control circuit is dead\u003c\/li\u003e\n\u003cli\u003eBurnt smell, discoloration, or a blown internal fuse link\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":63021618332019,"sku":"1172028","price":38.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047730954611,"sku":"1172028-GEN","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1172028_8fc6a6da-52d5-4d21-bf73-24d8642dd3e3.jpg?v=1782896236","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-wahm364a2-40va-208-230v-to-24v-step-down-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}