By utilizing a water seal to prevent live steam loss

Multi-Refrigerant Versatility: Fully compatible with R-404A

Can I adjust the manifold pressure on this valve

Technicians typically look for physical bulging

If the switch is open and the reset button is engaged

Lennox 80K89 Limit Switch 320788-702 By utilizing a water sealThe 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