Every hot water heater I've seen has a regulating knob somewhere. Look for it,possibly under a cover.
Thermostat
If you are using water and not steam there should be a temperature controller mounted in the side of the boiler, that is where the start and stop point of the boiler is controlled.
To turn on a furnace without a thermostat, locate the furnace switch on or near the unit. Flip the switch to the "on" position to start the furnace. Keep in mind that without a thermostat, you won't be able to control the temperature or set a programmed schedule for the furnace to operate.
A thermostat is commonly used to control a furnace. It measures the temperature in the room and signals the furnace to turn on or off to maintain a set temperature.
To turn off the furnace, locate the power switch or breaker connected to the furnace and switch it off. This will shut down the furnace and stop it from running.
There has to be a way to turn down the temperature somewhere on your water heater. There is either a dial on a manual control or up and down arrows on an eletronic one.
A heat sensor in a furnace detects the temperature inside the furnace. When the temperature reaches a certain level, the sensor signals the furnace to either turn on or off to maintain the desired temperature. This helps regulate the temperature and ensures the furnace operates efficiently by preventing overheating or underheating.
If you turn down the heat of the stove, the temperature of the boiling water will decrease. This is because the heat source is providing less energy to the water, causing it to cool down slightly.
By locating the thermostat and turning it down
To shut down a coal furnace, follow these steps: 1) Turn off the power supply to the furnace. 2) Close the air intake and exhaust dampers to restrict airflow. 3) Allow the fire to burn down and the furnace to cool before removing any remaining coal or ash. 4) Dispose of the coal ash properly and clean the furnace as needed.
The function of a furnace fan limit switch is to regulate the temperature inside the furnace. It helps control when the fan turns on and off based on the temperature of the air inside the furnace. If the switch is not working properly, it can cause the fan to run continuously or not turn on at all, which can lead to overheating or inefficient heating in the furnace.
Replace it or turn your Hot Water tank temperature down