{"product_id":"icp-40va-transformer-for-wjh348000ktp0a1-208-230v-to-24v-ships-today-1","title":"ICP 40VA Transformer for WJH348000KTP0A1 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM control transformer (part #1173691) is a 40VA step-down transformer with a 208\/230-volt primary and a 24-volt secondary, built for the ICP WJH348000KTP0A1 heat pump. The transformer converts incoming line voltage into the 24V control power that runs the thermostat, contactor coil, reversing valve solenoid, and the rest of the low-voltage circuit. When a transformer fails — often from a shorted reversing valve coil or a wiring short overloading the secondary — the entire control side goes dead: no thermostat display, no contactor pull-in, and no system operation. A buzzing transformer, a repeatedly blown low-voltage fuse, or zero volts across the secondary all point to replacement. This listing covers the transformer for the WJH348000KTP0A1 control package, which also includes the reversing valve coil (1172619), reversing valve with coil (1172618), and 24V barrier (1176032).\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\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e1173691\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl \/ Step-Down Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Heil \/ Tempstar\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\u003eRelated Parts\u003c\/td\u003e\n\u003ctd\u003e1176032 barrier, 1172619 rev valve coil, 1172618 rev valve w\/ coil\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 factory replacement for the ICP \/ Heil \/ Tempstar \/ Comfortmaker WJH348000KTP0A1 packaged heat pump. The 40VA 208\/230-to-24V rating is a common control-power spec across many residential heat pumps and air handlers — verify your primary tap and VA rating against the failed unit 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 disconnect, then verify zero voltage with a multimeter on both the primary and secondary leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-panel cover to expose the transformer and low-voltage terminal block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary tap (208 vs 230) and every secondary wire before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the leads, unbolt the transformer from the panel, and check for the short that may have caused the failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, land the primary on the correct voltage tap, and reconnect 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 and a normal thermostat call.\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 control power — dead thermostat, no contactor pull-in\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse or breaker\u003c\/li\u003e\n\u003cli\u003eAudible buzzing or burnt smell from the transformer\u003c\/li\u003e\n\u003cli\u003eZero or low voltage measured across the 24V secondary\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":63027229884787,"sku":"1176032-GEN","price":32.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047959380339,"sku":"1176032","price":42.84,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176032_c61ae094-aa7c-4770-8f22-c5bbb1b40c9f.jpg?v=1782883021","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wjh348000ktp0a1-208-230v-to-24v-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}