Trane SWT1277 Limit Switch this replacement knob retains the

this replacement knob retains the same physical dimensions and stem attachment for both the original series and the newer Lead-Free (LF) versions of the Watts 70A valves

Versatile Application: Compatible with various Sensus 496 orifice sizes to handle different inlet pressures and flow capacities

serving as the primary defense against heat exchanger failure and overheating

while the 30 Amp Resistive rating applies to non-inductive loads like electric heat strips

Trane SWT1277 Limit Switch this replacement knob retains theThe Trane SWT1277 Limit Switch is a critical safety component designed for precise thermal regulation in Trane and American Standard HVAC furnaces. As a high limit automatic reset switch, it monitors the supply air and heat exchanger temperatures to prevent hazardous overheating. This genuine OEM furnace limit switch features a 3 inch insertion length, ensuring accurate sensing deep within the plenum or blower housing. Operating on a normally closed