Lennox 80K89 Limit Switch 320734-701 Measure the resistance across the

Measure the resistance across the leads and compare the value against the official York PT chart for the current ambient temperature

When performing a boiler burner teardown or a commercial water heater repair

it is calibrated to open the electrical circuit if temperatures exceed the 215°F threshold and automatically reset once the system cools to 185°F

Key Benefits Optimized Flow Performance: The 8

This Carrier HVAC temperature sensor is essential for contractors looking to restore factory-spec performance in residential split systems and light commercial packages

Lennox 80K89 Limit Switch 320734-701 Measure the resistance across theThe Lennox 80K89 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces. Engineered as a 150 180F AUTO Limit Switch, this L180 30F thermal cutout ensures the burner assembly shuts down if internal temperatures exceed the 180F threshold, preventing heat exchanger damage. Once the plenum cools by approximately 30F, the switch automatically resets, restoring normal furnace cycles. This Lennox