{"product_id":"tempstar-pressure-switch-set-for-tsh548gka100-hi-lo-24v-ships-today","title":"Tempstar Pressure Switch Set for TSH548GKA100 — Hi\/Lo 24V | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM high and low refrigerant pressure switch set — part 1184656 (Pressure Switch, High) and 1184655 (Pressure Switch, Low) — protects the Tempstar TSH548GKA100 compressor from damaging operating conditions. The high-pressure switch opens the control circuit and shuts the compressor down if discharge pressure climbs too high (dirty condenser, failed fan, overcharge). The low-pressure switch opens on a loss of charge or restricted suction to prevent the compressor from running in a vacuum. Both are normally-closed safety devices wired in the 24V control circuit.\u003c\/p\u003e\u003cp\u003eA failed-open or chattering switch will lock the system out and prevent the compressor from running even when conditions are normal; a failed-closed switch removes safety protection. Symptoms include a compressor that won't start, intermittent lockouts, or short-cycling on the safety circuit.\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 (high), 1184655 (low)\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 (ICP \/ Heil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit\u003c\/td\u003e\n\u003ctd\u003e24V control, normally closed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eCompressor high\/low pressure protection\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt for the Tempstar TSH548GKA100 and shared across ICP-family units (Heil, Comfortmaker, Tempstar) using the same high\/low pressure protection. Match the switch trip ratings and fitting\/connector style to your existing parts before ordering.\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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the condenser service panel to reach the refrigerant lines and switches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the switch wiring and note which switch is high vs. low.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Disconnect the 24V leads; switches on Schrader-style ports thread off without recovery, while brazed\/sweat switches require refrigerant recovery first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Install the new switch on its matching port, reconnect the 24V leads per your photo, and check for leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run the system, and confirm normal pressures with no 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 and the control circuit reads open at the switch.\u003c\/li\u003e\n\u003cli\u003eIntermittent high- or low-pressure lockouts under normal conditions.\u003c\/li\u003e\n\u003cli\u003eShort-cycling traced to the safety\/pressure circuit.\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":63021631078771,"sku":"1184656-GEN","price":34.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048470298995,"sku":"1184656","price":45.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-1184656_1abb308f-2767-40a4-937f-cf85ecca6553.jpg?v=1782960718","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-pressure-switch-set-for-tsh548gka100-hi-lo-24v-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}