During the operation of an electric heating oil heater, when there is no water or the water level is below a certain threshold in the water tank during heating, it is referred to as dry burning. This is not the intended operating state; rather, it is an unexpected phenomenon that occurs after an electrical heating system malfunction. Continuing this condition can have dire consequences. To prevent the electric heating oil heater from entering a dry burning state, products on the market are equipped with various temperature controllers or thermal protectors. These accessories can disconnect the circuit and stop heating once the water temperature at the test point reaches the set value. Similarly, when the water temperature at the test point drops to the lower limit, it will automatically close. The concern over the dry burning of explosion-proof heaters is due to the fact that dry burning can cause the high heat generated by the explosion-proof heater to be directly conducted to the water tank connection points, repeatedly heating them. This can damage critical components such as the sealing ring, insulation layer, and water tank, posing significant hazards.

When using explosion-proof electric heaters, they must never be placed near flammable or explosive materials, and a safe distance must be maintained. Additionally, the explosion-proof heaters must be placed on a non-conductive, non-flammable base; the safe current-carrying capacity of the wires must meet the capacity requirements of the explosion-proof heater.

Generally speaking, those who have used explosion-proof electric heaters may have encountered the issue of an unpleasant odor after some time of use. The primary reason for this is the buildup of scale on the electric heater after extended use, which not only reduces its heating efficiency but can also cause unnecessary harm to one's health over time.

Therefore, the cleaning of explosion-proof electric heaters becomes extremely important. However, due to the large water tank and limited cleaning port accessibility, explosion-proof electric heaters with enameled inner shells require frequent replacement of magnesium rods, typically every one to two years.