{"product_id":"icp-40va-transformer-for-wjh330000k000a1-208-230v-to-24v-heat-pump-control-ships-today-1","title":"ICP 40VA Transformer for WJH330000K000A1 — 208\/230V to 24V Heat Pump Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is the OEM 40VA control transformer (part #1173691) for the ICP\/Heil\/Tempstar WJH330000K000A1 heat pump. The transformer steps line voltage (208\/230V) down to the 24V control voltage that powers the thermostat circuit, contactor coil, reversing valve solenoid, and defrost board. When a control transformer fails, the entire low-voltage control system goes dead — the system will not respond to the thermostat even though line power is present. Common failure signs include a no-call\/no-response system, a tripped 24V fuse, a buzzing or scorched transformer, or 0 volts across the secondary (R to C) terminals. This 40VA rating provides enough VA headroom for the reversing-valve coil and contactor loads found in this heat pump.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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 \/ Comfortmaker)\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\u003e40 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssociated Parts\u003c\/td\u003e\n\u003ctd\u003e1176032 Barrier 24V, 1172619 Rev-Valve Coil 24V, 1173708 Reversing Valve w\/Coil 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eFits the ICP\/Heil\/Tempstar\/Comfortmaker WJH330000K000A1 heat pump and other units in this platform using a 208\/230V-to-24V 40VA control transformer. Always confirm the primary\/secondary voltage and VA rating against the unit you are servicing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control-panel service panel.\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 — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer from the bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new transformer, connect primary leads to the matching line voltage (208\/230V) and secondary leads to the 24V control terminals per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm 24–28V across the R and C terminals; verify the system responds to a thermostat call.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNo 24V control power \/ system completely unresponsive to the thermostat\u003c\/li\u003e\n\u003cli\u003eRepeatedly blown 24V control fuse\u003c\/li\u003e\n\u003cli\u003eBuzzing, overheating, or a burnt-smelling transformer\u003c\/li\u003e\n\u003cli\u003e0V measured across the secondary (R–C) with line voltage present at the primary\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63027231392115,"sku":"1176032","price":32.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047381975411,"sku":"1176032-GEN","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-1176032_9c39f3b8-f7af-4f58-89f5-23af247d3026.jpg?v=1782882962","url":"https:\/\/nationalhvacparts.com\/products\/icp-40va-transformer-for-wjh330000k000a1-208-230v-to-24v-heat-pump-control-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}