{"product_id":"oem-lennox-pressure-switch-18l21","title":"OEM Lennox Pressure Switch — 18L21","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 18L21\u003c\/strong\u003e is a genuine OEM pressure switch designed to monitor the negative pressure created by the draft inducer motor in your Lennox furnace, ensuring safe and efficient combustion. If this switch fails, you may experience symptoms such as the furnace failing to ignite, short cycling, or a blinking error code indicating a pressure switch fault. This direct OEM replacement is compatible with select Lennox gas furnace models and ensures a precise fit for reliable, long-term performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081033826675,"sku":"LNX-18L21","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-18l21","provider":"National HVAC Parts","version":"1.0","type":"link"}