the 19 Series is also National Board capacity certified for air and non-hazardous gas service under Section VIII

Built with a 3

Built for low-pressure gas applications

if the original sensor has drifted and is not "opening" at the 60°F threshold

Heil Quaker ICP 34335004 Limit Switch 321702-401 the 19 Series is alsoUpgrade your system reliability with the Heil Quaker ICP 34335004 Limit Switch, a precise OEM replacement engineered for high performance thermal regulation. Designed specifically for Heil, Quaker, and International Comfort Products (ICP) furnace units, this automatic reset limit switch is a critical safety component that monitors heat exchanger temperatures to prevent thermal overload. When the internal plenum temperature reaches its 110? F set