{"product_id":"tempstar-pressure-switch-set-for-tsh518gka200-hi-lo-24v-ships-today","title":"Tempstar Pressure Switch Set for TSH518GKA200 — Hi \u0026 Lo 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM high and low refrigerant pressure switch set for the Tempstar TSH518GKA200 heat pump, including part 1184656 (PRESSURE SWITCH HI) and 1184655 (PRESSURE SWITCH LO). These 24V safety switches monitor refrigerant pressure on the high and low sides of the system and open the control circuit if pressure climbs too high or drops too low, shutting down the compressor before it can be damaged. The high-pressure switch protects against blocked condenser airflow, overcharge, or a failing fan; the low-pressure switch protects against loss of charge, a restricted metering device, or evaporator airflow problems. A stuck-open switch will prevent the system from starting, while a failed switch can allow damaging operating conditions to continue.\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 Numbers\u003c\/td\u003e\n\u003ctd\u003e1184656 (Hi), 1184655 (Lo)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eRefrigerant Pressure Switch, High \u0026amp; Low\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\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eAuto-reset compressor safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect-fit replacements for the Tempstar TSH518GKA200 condensing unit. These switches are shared across many ICP, Heil, and Comfortmaker heat pumps that use the same sealed-system safety design. Confirm the OEM part numbers and fitting type before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power and verify zero voltage with a multimeter; recover or isolate refrigerant per the switch connection type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the service panel to reach the high- and low-side switch locations on the refrigerant lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire leads and routing for both the Hi and Lo switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the 24V leads and unthread or unclip the failed switch from its port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Thread on the new switch with proper sealant or gasket, then reconnect the leads to match your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, start the system, and confirm normal operation with no nuisance lockouts.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSystem locks out on a pressure fault with normal refrigerant charge\u003c\/li\u003e\n\u003cli\u003eCompressor will not start and the control board flashes a pressure-switch code\u003c\/li\u003e\n\u003cli\u003eVisible corrosion or refrigerant oil at the switch body\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test at known-good pressures\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":63021632225651,"sku":"1184656-GEN","price":32.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048469840243,"sku":"1184656","price":42.84,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1184656_fd11714a-d80a-4d62-861f-2d67e5060285.jpg?v=1782960700","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-pressure-switch-set-for-tsh518gka200-hi-lo-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}