{"product_id":"oem-lennox-relay-start-capacitor-kit-12j90","title":"OEM Lennox Relay \u0026 Start Capacitor Kit — 12J90","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e12J90\u003c\/strong\u003e relay and start capacitor assembly kit provides the extra torque needed to get a compressor or motor up to running speed. The start capacitor delivers a high-capacitance boost during startup, while the potential (start) relay disconnects that capacitor from the circuit once the motor reaches full speed — working together to ensure reliable, hard-starting performance in your Lennox equipment.\u003c\/p\u003e\u003cp\u003eSymptoms of a failing start capacitor or relay include a compressor that hums but won't start, frequent tripping of the breaker, clicking or buzzing at the contactor, hard starts, and intermittent no-cool or no-heat calls. A bulged, leaking, or burnt capacitor and pitted relay contacts are clear indications this kit needs replacement.\u003c\/p\u003e\u003cp\u003eBecause the start capacitor's microfarad rating and the relay's pickup and dropout voltages must be matched to the motor, installing the OEM Lennox \u003cstrong\u003e12J90\u003c\/strong\u003e kit is the safest choice. Mismatched aftermarket components can fail to disconnect the capacitor, overheat windings, and destroy the motor. This factory-matched assembly ensures correct starting characteristics and long-term reliability.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081134326131,"sku":"LNX-12J90","price":18.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-start-LNX-12J90.jpg?v=1783763267","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-relay-start-capacitor-kit-12j90","provider":"National HVAC Parts","version":"1.0","type":"link"}