{"product_id":"oem-lennox-fan-limit-thermostat-90-130-f-21p88","title":"OEM Lennox Fan\/Limit Thermostat 90-130°F — 21P88","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e21P88\u003c\/strong\u003e is an adjustable fan and limit thermostat with a 90–130°F operating range and a 20°F differential. This control manages blower operation based on plenum temperature and provides high-limit safety protection, shutting down the heat source if temperatures climb too high. Its lower range makes it well suited to Lennox applications that cycle the fan at more moderate temperatures for improved comfort and efficiency.\u003c\/p\u003e\u003cp\u003eA failing fan\/limit thermostat can cause the blower to run non-stop, fail to start, or cycle erratically. You may also notice cool air at the registers during startup, short cycling, or safety shutdowns caused by a drifting bimetal element or worn contacts.\u003c\/p\u003e\u003cp\u003eInstalling the OEM Lennox \u003cstrong\u003e21P88\u003c\/strong\u003e ensures the exact 90–130°F range, 20°F differential, and mounting profile Lennox specifies. As a safety-rated component, using the correct factory control is essential — generic replacements may misread temperature or fail to protect the equipment. The genuine part restores precise, dependable fan and limit control for your Lennox system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081078653299,"sku":"LNX-21P88","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-limit-switch-snap-disc-LNX-21P88.jpg?v=1783760932","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-fan-limit-thermostat-90-130-f-21p88","provider":"National HVAC Parts","version":"1.0","type":"link"}