{"product_id":"delfield-2190154-rocker-switch-spst-20a-125v","title":"Delfield 2190154 Rocker Switch, SPST 20A\/125V","description":"\n\u003ch2\u003eDelfield 2190154 SPST Rocker Switch\u003c\/h2\u003e\n\u003cp\u003eThe Delfield 2190154 is an SPST rocker switch used to open and close a single electrical circuit in commercial refrigeration equipment. Depending on the Delfield model and wiring layout, this type of switch can control a light circuit, power function, fan circuit, or operator-accessible control circuit. Its job is simple but important: it must carry the rated load without overheating and make a clean connection when switched on.\u003c\/p\u003e\n\u003cp\u003eAn SPST switch has one pole and one throw. In practical service terms, it is an on\/off switch for one circuit path. When the rocker is pressed on, the internal contacts close and allow current to pass. When pressed off, the contacts open and interrupt current. If the contacts pit, arc, loosen, or overheat, the circuit can become intermittent even though the switch still moves physically.\u003c\/p\u003e\n\u003ch3\u003eFailure Symptoms Technicians See\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLight, fan, or controlled circuit does not energize from the switch.\u003c\/li\u003e\n\u003cli\u003eSwitch feels loose, collapsed, or fails to click positively.\u003c\/li\u003e\n\u003cli\u003eTerminals show heat discoloration or melted insulation.\u003c\/li\u003e\n\u003cli\u003eEquipment works when the switch is wiggled but fails under vibration.\u003c\/li\u003e\n\u003cli\u003eContinuity is inconsistent across the switch terminals.\u003c\/li\u003e\n\u003cli\u003ePanel cutout or wire terminals are damaged from prior overheating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDiagnostic Approach\u003c\/h3\u003e\n\u003cp\u003eA technician should disconnect power, remove the switch from the circuit, and test continuity across the switched terminals in both positions. The connected load should also be inspected, because a fan motor or lamp circuit drawing excessive current can damage a new switch. Related components include the wire terminals, harness, connected load, fuse or breaker, and control circuit. If the terminals are overheated, repairing the wiring is as important as replacing the switch.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does Delfield 2190154 do?\u003c\/strong\u003e\u003cbr\u003eIt opens and closes a single electrical circuit as an SPST rocker switch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens when it fails?\u003c\/strong\u003e\u003cbr\u003eThe connected circuit may not turn on, may cut out intermittently, or may overheat at the terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it diagnosed?\u003c\/strong\u003e\u003cbr\u003eTechnicians test continuity through the switch and inspect terminal condition under the correct wiring layout.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else should be checked?\u003c\/strong\u003e\u003cbr\u003eThe connected load, wiring terminals, harness, and circuit protection should be inspected for heat damage or overload.\u003c\/p\u003e\n\n\u003ch3\u003eRelated resources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/commercial-condenser-fan-motors-oem-replacement-parts\"\u003erelated commercial equipment parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/contact\"\u003econtact fitment support\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/all\"\u003eall commercial refrigeration parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Delfield","offers":[{"title":"Default Title","offer_id":50105524289759,"sku":"2190154","price":29.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/3047\/0623\/files\/delfield-2190154-rocker-switch-spst-20a125v-oem-replacement-part-partsdirectonline-7379821.jpg?v=1782194290","url":"https:\/\/partsdirectonline.com\/products\/delfield-2190154-rocker-switch-spst-20a-125v","provider":"PartsDirectonline","version":"1.0","type":"link"}