Look for a bulging top casing

Before replacing the switch

though this individual knob is the go-to for external mechanical damage

While similar in temperature range to other 180-200F switches

Featuring a 3/8" SAE flare by 1/4" MPT connection

Robertshaw 10-166 Pilot Orifice Look for a bulging topThe Robertshaw 10 166 is a high precision LP gas pilot orifice engineered specifically for the 1810 100 Uni Pilot Kit and 1800 1810 series (2B, 2BLC, 9B) pilot assemblies. Featuring a fixed . 011" orifice size, this component ensures a consistent and stable pilot flame crucial for the reliable ignition of main burners in commercial cooking and high demand HVACR systems. It is designed to interface seamlessly with 1 4" pilot tubing, providing a gas