{"product_id":"icp-40va-transformer-for-wjh424000ktp0a1-208-230v-to-24v-ships-today-1","title":"ICP 40VA Transformer for WJH424000KTP0A1 — 208\/230V to 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM 40VA control transformer (PN 1173691) steps the 208\/230-volt line power down to the 24-volt control voltage that runs the thermostat, contactor coil, reversing-valve coil and control board in the ICP\/Heil\/Tempstar WJH424000KTP0A1 heat pump. Every low-voltage component in the system depends on this transformer for clean, regulated 24V power. When a transformer fails — usually from an overload, a shorted thermostat wire, or simple age — the entire control circuit goes dead: no thermostat display, no contactor pull-in, and no system operation. Replacing the transformer with the correct 40VA, 208\/230-to-24V unit restores control power and protects downstream components. This part lives in the same control assembly as the reversing-valve coil and barrier hardware.\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\u003e1173691\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 \/ 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 24V, 1172619 rev-valve coil 24V, 1173715 valve w\/ coil 24V\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\/Heil\/Tempstar WJH424000KTP0A1 heat pump. As a standard 40VA 208\/230-to-24V control transformer it also services comparable Heil, Tempstar, Comfortmaker and Carrier\/Bryant units with the same control voltage. Confirm VA rating and primary\/secondary voltages match your existing transformer 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 disconnect and breaker, then verify zero voltage with a multimeter on the primary leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-panel service cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the primary (line) and secondary (24V) wire connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the primary and secondary leads and unbolt the old transformer from its mounting tab.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, land the 208\/230V leads on the primary and the 24V leads on the secondary exactly as photographed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24VAC across the secondary, then verify the thermostat and contactor energize.\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 and the control circuit is dead.\u003c\/li\u003e\n\u003cli\u003eNo 24V output measured across the secondary terminals.\u003c\/li\u003e\n\u003cli\u003eTransformer is hot, buzzing or smells burnt.\u003c\/li\u003e\n\u003cli\u003eRepeated control-fuse blows after a thermostat wiring short.\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":63027229294963,"sku":"1176032-GEN","price":27.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63047959609715,"sku":"1176032","price":36.34,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176032_0703e56b-5ccf-4bc5-9256-cc9cdb5a9892.jpg?v=1782883040","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wjh424000ktp0a1-208-230v-to-24v-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}