Weil McLain 510-300-014 Manual Reset Spill Switch 240°F

The Weil McLain 510-300-014 Spill Switch is a control component that senses spillage of flue gas in the HVAC systems. It checks the conditions of the combustion chamber or vents and its contact when the temperature is above 240°F, indicating a draft or obstruction. The switch should be manually reset after being tripped. It is a vital secure interlock fitted in the venting or draft hood of a boiler or a furnace and it stops further operation of the burner in case of hazardous exhaust conditions.