Carrier HH680300 Limit Switch R-407A The 1/4" pilot tap is

The 1/4" pilot tap is conveniently located on the right side of the valve body for standard pilot line routing

and multiple lengths of mounting screws to accommodate different motor housing depths

preventing control failure due to voltage fluctuations

Debris-Resistant Internals: Engineered with no close-fitting sliding parts in the water passages

Carrier HH680300 Limit Switch R-407A The 1/4" pilot tap isThe Carrier HH680300 is an essential OEM L140 15F 3 wire limit switch designed for precision thermal monitoring in residential and commercial furnaces. As a primary safety control switch, it features a fixed 140 degree Fahrenheit cut out setpoint and a 15 degree differential, ensuring the system interrupts operation effectively if the plenum temperature exceeds safe factory limits. This SPDT limit switch is engineered for high cycle reliability,