Johnson Controls T-4000-2642 Cover The White Rodgers 3L09-20 Limit

The White Rodgers 3L09-20 Limit Switch is a professional-grade 1/2" bimetal disc limit control designed for high-limit temperature protection in forced air heating systems

Using a multimeter on the DC millivolt setting

The Watts 0723064 Repair Kit (RK-FHB-V) is the specified factory solution for restoring the vent float assembly on both 1/2-inch and 3/4-inch units

Durable Construction: Features a high-pressure rated steel shell with UL and CE certification for demanding field conditions

strainer cleaning

Johnson Controls T-4000-2642 Cover The White Rodgers 3L09-20 LimitJohnson Controls T 4000 2642 Gold Plastic Cover, Horizontal, Includes Thermometer and Setpoint Window, Johnson Controls Labeled