{"product_id":"tempstar-pressure-switch-set-for-tsh542hka200-hi-lo-refrigerant-switches-ships-today","title":"Tempstar Pressure Switch Set for TSH542HKA200 — Hi \u0026 Lo Refrigerant Switches | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM pressure switch set keeps your Tempstar TSH542HKA200 heat pump operating safely by monitoring refrigerant pressure on both the high and low sides. The high-pressure switch (part 1184656) opens to shut down the compressor when discharge pressure climbs too high — a common result of a dirty condenser coil, blocked airflow, or an overcharged system. The low-pressure switch (part 1184655) protects against loss of charge, a failed metering device, or low ambient operation. When either switch fails, the unit may short-cycle, fail to start, or lock out entirely. Replacing both switches as a set ensures complete refrigerant safety 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 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\u003eHigh \u0026amp; Low Refrigerant Pressure Switch\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\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCompressor protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM direct replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered for the Tempstar TSH542HKA200 heat pump. Because ICP, Heil, Tempstar, Comfortmaker, and Day \u0026amp; Night units share common components, these switches also fit many equivalent models built on the same platform. Always confirm against your unit's OEM part numbers.\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. Recover or confirm system is not under pressure where required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the spade terminals from the failed switch and unthread\/release it from the refrigerant port (Schrader-style depressor type, no charge loss).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Thread the new switch onto the matching port and reconnect wiring per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power and verify the system starts and runs without nuisance lockout.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompressor won't start or trips on lockout\u003c\/li\u003e\n\u003cli\u003eSystem short-cycles on and off\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity test at normal operating pressure\u003c\/li\u003e\n\u003cli\u003eVisible corrosion or damaged terminals on the switch body\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":63021631144307,"sku":"1184656-GEN","price":39.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048470266227,"sku":"1184656","price":51.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1184656_17417288-4826-4916-817b-12be2c0748c1.jpg?v=1782960716","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-pressure-switch-set-for-tsh542hka200-hi-lo-refrigerant-switches-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}