{"product_id":"tempstar-pressure-switch-set-for-tsh518gka100-hi-lo-24v-ships-today","title":"Tempstar Pressure Switch Set for TSH518GKA100 — 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 TSH518GKA100 heat pump, including part 1184656 (PRESSURE SWITCH HI) and 1184655 (PRESSURE SWITCH LO). These 24V safety switches continuously monitor high- and low-side refrigerant pressure and open the control circuit to shut down the compressor if pressure rises or falls outside safe limits. The high-pressure switch guards against overcharge, dirty condenser coils, or a stalled fan, while the low-pressure switch protects against low charge, a restricted metering device, or poor evaporator airflow. A switch stuck open prevents the unit from starting; a switch that fails to trip allows damaging pressure conditions to persist.\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 TSH518GKA100 condensing unit, and shared across many ICP, Heil, and Comfortmaker heat pumps using the same sealed-system safety design. Verify 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; isolate or recover 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 switches on the refrigerant lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the 24V leads and routing for both switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the 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 the proper seal, 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 despite a correct charge\u003c\/li\u003e\n\u003cli\u003eCompressor will not start and a pressure-switch fault code appears\u003c\/li\u003e\n\u003cli\u003eCorrosion or oil residue at the switch body\u003c\/li\u003e\n\u003cli\u003eSwitch fails a continuity check 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":63021632291187,"sku":"1184656-GEN","price":32.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048469807475,"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_0ce45591-c907-4300-8082-b3bfa9b3cce7.jpg?v=1782960697","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-pressure-switch-set-for-tsh518gka100-hi-lo-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}