it is optimized for go/no-go status of fixed loads

If your specific furnace or boiler assembly requires longer runs

while Y90AA-4211 is the manufacturer sub-component identification

Field technicians will recognize this as the drop-in equivalent for Honeywell Q3451B1004 and Carrier 146-62-100 specifications

Bradford White 415-42034-00 Thermostat it is optimized for go/no-goThe Bradford White 415 42034 00 Thermostat is a genuine OEM surface mount temperature control designed for high performance residential and electric utility water heaters. As a direct factory replacement for discontinued part numbers 265 42034 00 and 219 40360 00, this component ensures precise thermal regulation and system safety. Engineered specifically for Bradford White electric water heater models, this thermostat manages heating element cycles