{"product_id":"icp-transformer-for-wjh436000ktp0a1-40va-208-230v-to-24v-ships-today","title":"ICP Transformer for WJH436000KTP0A1 — 40VA 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM 40VA control transformer (part #1173691) for the ICP\/Tempstar\/Heil WJH436000KTP0A1 heat pump. The transformer steps line voltage of 208\/230V down to the 24V control circuit that feeds the thermostat, contactor coil, reversing valve solenoid, and defrost board. A failed transformer kills the entire low-voltage control system — the thermostat goes blank, the contactor never energizes, and the unit looks dead even with full high-voltage power at the disconnect. This combo listing also includes the related 24V reversing-valve coil (1172619), the reversing valve with coil (1175621), and the barrier (1176032) used on this model.\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\u003ePrimary OEM Part Number\u003c\/td\u003e\n\u003ctd\u003e1173691 (TRANS 208\/230\u0026gt;24 40VA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Part Numbers\u003c\/td\u003e\n\u003ctd\u003e1176032, 1172619, 1173691, 1175621\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\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\/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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct-fit OEM replacement for the ICP family WJH436000KTP0A1 heat pump and shared platform units sold under the ICP, Tempstar, Heil, and Comfortmaker labels. Confirm your existing transformer is rated 208\/230V to 24V at 40VA 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 outdoor disconnect, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to expose the control box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all primary and secondary wire connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, reconnect the primary to matching line voltage and the secondary to the 24V circuit per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24V across the secondary and normal thermostat\/contactor operation.\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 at the control board or thermostat despite high-voltage power present\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown low-voltage fuse or a buzzing transformer\u003c\/li\u003e\n\u003cli\u003eContactor or reversing valve fails to energize on a call\u003c\/li\u003e\n\u003cli\u003eVisible scorching, swelling, or a burnt smell at 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":63021548011891,"sku":"1176032","price":45.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047748813171,"sku":"1176032-GEN","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176032_b3eb4a74-310d-4492-9683-eb48e78e68f8.jpg?v=1782896682","url":"https:\/\/nationalhvacparts.com\/products\/icp-transformer-for-wjh436000ktp0a1-40va-208-230v-to-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}