Description
The Lennox 78H74 Limit Switch is an essential safety device for many HVAC applications such as furnaces and air handlers. It also plays the role of a watchdog in terms of temperature or airflow. If it senses temperatures beyond the limit it has set (L185°F), it will shut down or short circuit the electrical circuit. This helps to avoid cases where your equipment is damaged due to high temperatures. The Lennox 78H74 Limit Switch is a tiny but essential part of your HVAC system.
