It is classed as a 'regular' burner

is a 10K Ohm Type III Thermistor engineered specifically for high-accuracy duct temperature monitoring in commercial BAS and light industrial HVAC applications

Universal Replacement: Fully interchangeable with the 204480/U

it integrates a simplified well-insertion design that slides directly into standard thermowells

Direct OEM Matching: Functionally identical to Lochinvar RLV30000 for a seamless "drop-in" replacement without piping modifications

Weil McLain 510-350-218 Temperature Control Els PW 17895 It is classed as aThe Weil McLain 510 350 218 Pump Temperature Control is a critical OEM replacement part designed for precision thermal management in hydronic heating systems. Specifically engineered for use as a circulator pump control, this 60T 82 model ensures optimal boiler efficiency by regulating water temperatures and preventing thermal shock. This immersion style temperature control uses a dependable bimetal sensing element to trigger circulator cycles,