{"product_id":"oem-lennox-pressure-switch-21u56","title":"OEM Lennox Pressure Switch — 21U56","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 21U56\u003c\/strong\u003e is a genuine OEM pressure switch that monitors the negative pressure created by the inducer motor in your Lennox furnace, ensuring safe ignition and operation conditions are met before allowing the system to fire. A faulty pressure switch can cause symptoms such as the furnace failing to start, short cycling, or displaying a pressure switch fault or error code on the control board. This direct OEM replacement is engineered for compatibility with applicable Lennox furnace models, delivering dependable safety and performance.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63080929558899,"sku":"LNX-21U56","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-21u56","provider":"National HVAC Parts","version":"1.0","type":"link"}