Description
The Lennox 87H90 Auto Limit Switch is an essential safety device that should be installed in all residential and commercial HVAC systems. It is also used to turn off your heating system when the temperature reaches a dangerous level which is usually between 150°F and 190°F. Installed at the air path of the furnace, the switch measures the temperature of the air, and breaks the circuit when the temperature rises. This helps avoid cases where the system overheats or some of the components get damaged, which is unsafe for your HVAC system. This Lennox 87H90 Auto Limit Switch is a safety device for your heating system.
