{"product_id":"tempstar-low-pressure-switch-assembly-for-t4h430gkd100-oem-1177594-ships-today","title":"Tempstar Low Pressure Switch Assembly for T4H430GKD100 — OEM 1177594 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis is a genuine OEM low pressure switch assembly (part number 1177594) for the Tempstar T4H430GKD100 outdoor unit. The low pressure switch is a safety control that monitors suction-side refrigerant pressure and opens the control circuit if pressure drops too low — protecting the compressor from running on a low charge, a restriction, or a frozen coil. When the switch fails or sticks open, the unit may short-cycle, lock out, or refuse to start even with a proper charge; when it sticks closed, it can let the compressor run unprotected. This factory assembly is matched to the original cut-out and cut-in pressure settings for reliable compressor protection.\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\u003e1177594\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eLow Pressure Switch Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eSuction-side low-pressure compressor protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eOutdoor condensing\/heat-pump unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT4H430GKD100\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 replacement for the Tempstar T4H430GKD100 outdoor unit and other ICP-family units (Heil, Comfortmaker, ICP) using the same low pressure switch assembly. Confirm the original part number and fitting\/connection type before ordering.\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 outdoor disconnect and verify zero voltage with a multimeter; recover or isolate refrigerant if the switch is not on a Schrader fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service\/electrical panel to reach the switch and its leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wiring and refrigerant connection before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the two control wires, then unthread the switch from its Schrader port or fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Thread on the new switch (use a new core\/seal as needed), reconnect the control wires per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, check for leaks, and confirm the unit starts and stays running under normal pressures.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnit locks out or won't start despite a correct refrigerant charge.\u003c\/li\u003e\n\u003cli\u003eCompressor short-cycles on the low-pressure safety.\u003c\/li\u003e\n\u003cli\u003eSwitch tests open at normal operating pressure (or won't open when it should).\u003c\/li\u003e\n\u003cli\u003eCorroded, leaking, or physically damaged switch body or fitting.\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":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021787087219,"sku":"1177594-GEN","price":38.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048463712627,"sku":"1177594","price":50.64,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1177594_c0da9dd4-dee6-42e5-84fb-8f41ea6d90ff.jpg?v=1782960515","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-low-pressure-switch-assembly-for-t4h430gkd100-oem-1177594-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}