{"product_id":"tempstar-low-pressure-switch-assembly-for-t4h736gkd200-ships-today","title":"Tempstar Low Pressure Switch Assembly for T4H736GKD200 — Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM low pressure switch assembly (part number 1177594) for the Tempstar T4H736GKD200. The low pressure switch is a safety device wired into the 24V control circuit that monitors suction-side refrigerant pressure. If pressure drops below its trip point — from a refrigerant leak, loss of charge, a restricted metering device, or low airflow — the switch opens and shuts down the compressor to protect it from running dry or slugging. Symptoms of a failed or tripped switch include a compressor that will not start or that short-cycles, a control board logging a low-pressure lockout, or the system shutting off shortly after starting. A switch can also fail open from contact fatigue even when charge is fine. Replacing it with the correct OEM assembly, after confirming the actual refrigerant charge, restores proper compressor protection.\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\u003eOEM Part 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\u003eCircuit\u003c\/td\u003e\n\u003ctd\u003e24V Control Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eLoss-of-Charge \/ Low-Pressure Compressor Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT4H736GKD200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eFactory-spec for the Tempstar T4H736GKD200 and shared ICP \/ Heil condensing units using the same low pressure switch and connection fitting. Verify the trip rating and fitting style against the failed part before ordering.\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, then verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service panel to reach the switch on the suction line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the two control wires and the switch fitting before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the control leads, then unthread the switch from its Schrader-style fitting (most replace without recovering refrigerant).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Thread on the new switch with the supplied gasket\/seal and reconnect the control leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm the switch is closed at normal pressure, and verify the compressor starts and stays running.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompressor will not start or short-cycles on a pressure fault\u003c\/li\u003e\n\u003cli\u003eControl board shows a low-pressure lockout\u003c\/li\u003e\n\u003cli\u003eSystem shuts down shortly after starting\u003c\/li\u003e\n\u003cli\u003eSwitch reads open on the multimeter with a confirmed-good refrigerant charge\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":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021781090675,"sku":"1177594-GEN","price":32.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048464892275,"sku":"1177594","price":41.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1177594_eed13564-0191-4297-a6b6-6ceb3c5affdc.jpg?v=1782960539","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-low-pressure-switch-assembly-for-t4h736gkd200-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}