the orifice may be obstructed or improperly sized

Mixing tubes are typically required for duct-mounted sensors (TS121/TS211) rather than wall-mounted space sensors

Why is my oil control tripping on startup

Common Questions Is the Robertshaw 5600-311 used for the top or bottom element

ensuring seamless communication with the system controller

Utica-Dunkirk 29198 Limit Switch 320788-702 the orifice may be obstructedThe Utica Dunkirk 29198 Limit Switch is a critical high limit safety control designed for hydronic and forced air heating systems. Engineered for precision, this L140 20F limit switch features a 140F opening threshold and a 20F differential, ensuring the burner cycles off before internal temperatures exceed safe operating parameters. As a professional grade HVAC high limit control, it utilizes a bimetal disc for snap action switching, providing rapid