{"product_id":"icp-control-board-for-wpa4304000rkb1-oem-circuit-board-ships-today","title":"ICP Control Board for WPA4304000RKB1 — OEM Circuit Board | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is the genuine OEM control circuit board (part number 1178001) for the ICP\/Tempstar\/Heil WPA4304000RKB1 condensing unit. The control board is the brain of the outdoor unit — it manages the compressor contactor sequence, monitors the high- and low-pressure safety switches, enforces the anti-short-cycle delay, and processes the thermostat call to coordinate cooling operation. When the board fails, symptoms range from a no-cool condition to erratic cycling, ignored safety inputs, or an outdoor unit that simply will not respond to a call even though 24V control power is present. Boards commonly fail from power surges, lightning, moisture intrusion, or burnt relays and traces after a stuck contactor or shorted control circuit.\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\u003e1178001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eControl Circuit Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VAC\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\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWPA4304000RKB1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eBuilt as the direct factory replacement for the ICP WPA4304000RKB1 condensing unit and used across ICP-family outdoor units marketed as Tempstar, Heil, Comfortmaker, and Arcoaire. Confirm the printed part number 1178001 and the board's connector and relay layout against your existing board before installing — control boards are model-specific and not interchangeable across platforms.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the electrical access panel to expose the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph every plug, terminal, and wire color before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug each connector, release the board standoffs or mounting screws, and lift the old board out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new board on its standoffs and reconnect every plug and lead exactly per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, call for cooling, and verify the board energizes the contactor and the unit runs normally.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutdoor unit will not start despite 24V control power being present.\u003c\/li\u003e\n\u003cli\u003eErratic short-cycling or the compressor running without respecting delays.\u003c\/li\u003e\n\u003cli\u003eVisible burnt relays, scorched traces, or corrosion on the board.\u003c\/li\u003e\n\u003cli\u003eSafety switches (high\/low pressure) are ignored or misread.\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":63021538115955,"sku":"1178001","price":207.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047466516851,"sku":"1178001-GEN","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-1178001_1e503437-46ab-4952-921e-fec5e0f867f5.jpg?v=1782885454","url":"https:\/\/nationalhvacparts.com\/products\/icp-control-board-for-wpa4304000rkb1-oem-circuit-board-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}