About the Honeywell L8100B1128 High Limit Aquastat Controller
Honeywell L8100B1128 High-Limit Aquastat Controller. Controller operates at 100 F to 180 F. Honeywell L8100A,B, and C are immersion type controllers for regulating and Limiting the tank temperature in water heaters. As the water temperature rises past the set point, the controller switches off the gas valve.