{"product_id":"tempstar-low-pressure-switch-for-tch648gka200-refrigerant-safety-ships-today","title":"Tempstar Low Pressure Switch for TCH648GKA200 — Refrigerant Safety | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM low-pressure switch (part #1184655) is the loss-of-charge safety control on your Tempstar TCH648GKA200. Wired into the 24V control circuit, it monitors suction-side refrigerant pressure and opens the circuit to shut down the compressor if pressure drops below a safe threshold — protecting the compressor from running on a low or lost charge, which causes overheating and slugging damage. The switch closes again automatically once normal pressure is restored. A faulty switch typically causes nuisance lockouts where the compressor short-cycles or refuses to start even though the system is properly charged, or — if stuck closed — fails to protect the compressor during a real refrigerant loss.\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\u003e1184655\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eLow \/ Loss-of-Charge Pressure Switch\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 compressor safety cutout (auto-reset)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit\u003c\/td\u003e\n\u003ctd\u003e24V control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM\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-fit replacement for the Tempstar TCH648GKA200 condensing unit. The same low-pressure safety switch is used across matching ICP-family Heil, Comfortmaker, and Tempstar outdoor units. Confirm the cut-out\/cut-in pressure settings and fitting type against your original switch 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 breaker and outdoor disconnect. Verify zero voltage at the control wiring with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condensing unit 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 24V control leads before disconnecting them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the control leads, then unscrew the switch from its Schrader-style port (a self-sealing valve preserves the charge).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Thread the new switch onto the port snugly, then reconnect the 24V leads as photographed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and confirm the switch is closed under normal charge and the compressor starts on a cooling call.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompressor short-cycles or locks out despite a correct refrigerant charge\u003c\/li\u003e\n\u003cli\u003eUnit refuses to start with no other fault present\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test at normal operating pressure\u003c\/li\u003e\n\u003cli\u003eCompressor runs on low charge because the switch is stuck closed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003eShips same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021651886451,"sku":"1184655-GEN","price":28.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048466039155,"sku":"1184655","price":37.63,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1184655_a2f1b8ec-de2b-4b12-80f5-2436331d8494.jpg?v=1782960575","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-low-pressure-switch-for-tch648gka200-refrigerant-safety-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}