... Controller, Switches, Temperature Switch, Air Heater Thermal Switch, Sensor, Heater Thermostat, Heater, Water Thermostat, Water Heating System, Oven ... Thermometer, Thermostat Wiring, HVAC, HVAC Thermostat, Air Heater Fan PRINCIPLE OF OPERATION: With temperature rise, the expansion ... in most household appliances (electric kettle, electric heater, oven, rolling-type washing machine, water boiler ...