{"product_id":"tempstar-pressure-switch-set-for-tsh418gka101-hi-lo-oem-ships-today","title":"Tempstar Pressure Switch Set for TSH418GKA101 — Hi \u0026 Lo OEM | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM pressure switch set provides the refrigerant safety controls for the Tempstar TSH418GKA101 condensing unit: a high-pressure switch (part 1184656) and a low-pressure switch (part 1184655). The high-pressure switch opens the control circuit if discharge pressure climbs to an unsafe level — typically caused by a dirty condenser coil, failed condenser fan, or overcharge — protecting the compressor from rupture. The low-pressure switch opens on a loss of charge or a restricted line, preventing the compressor from running dry. When either switch sticks open or fails, the unit will short cycle, lock out, or refuse to start even though the contactor and capacitor are good.\u003c\/p\u003e\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\u003eHigh Pressure Switch\u003c\/td\u003e\n\u003ctd\u003e1184656 (Hi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Pressure Switch\u003c\/td\u003e\n\u003ctd\u003e1184655 (Lo)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eAuto-reset refrigerant safety switch (Hi\/Lo pair)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar (ICP \/ Heil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit\u003c\/td\u003e\n\u003ctd\u003e24 VAC low-voltage control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eTSH418GKA101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eFactory-matched safety controls for the Tempstar TSH418GKA101 and other ICP-family (Tempstar, Heil, Comfortmaker) condensing units using these part numbers. Replace as a matched pair for complete high- and low-side protection, or order the specific switch you need.\u003c\/p\u003e\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. Confirm the system is not under abnormal pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condensing unit service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the wire leads and switch locations before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the spade terminals and unthread the switch from its Schrader-style refrigerant port (most are self-sealing — minimal refrigerant loss).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Thread the new switch onto the matching port, snug per spec, and reconnect the leads per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, confirm the circuit is closed at normal pressures, and verify the unit runs through a full cooling cycle.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnit locks out or short cycles on a pressure fault\u003c\/li\u003e\n\u003cli\u003eCompressor won't start despite good contactor and capacitor\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test at normal operating pressure\u003c\/li\u003e\n\u003cli\u003eVisible corrosion or refrigerant residue at the switch body\u003c\/li\u003e\n\u003c\/ul\u003e\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":63021632782707,"sku":"1184656-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048469643635,"sku":"1184656","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1184656_0a6ab662-13bc-460d-82b1-4780ff1433da.jpg?v=1782960691","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-pressure-switch-set-for-tsh418gka101-hi-lo-oem-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}