the countdown begins from the start

including the Lennox G41UF

this OEM replacement limit switch features a fixed set point that shuts down the heating circuit when internal temperatures reach 155°F (Open)

If your furnace ignites then shuts down after a few seconds despite a clean sensor rod

If a new 410 uF start capacitor does not resolve the issue

White-Rodgers 90-118E Transformer the countdown begins from theThe White Rodgers 90 118E Transformer is a heavy duty fan control center engineered for seamless integration into 120V primary HVAC systems requiring 24V secondary control voltage. This transformer and relay combination features an energy limiting Class II transformer and a versatile SPNO SPNC relay (Single Pole Normally Open Normally Closed), making it an ideal choice for managing line voltage fans and pumps in residential or light commercial heating