Why does the booster pump keep running without water usage and feel hot to the touch?
2 Answers
The reasons why the booster pump keeps running without water usage and feels hot to the touch are as follows: Fault in the pressure control system: The water pump reaches the controlled pressure immediately upon starting and then stops working, indicating an issue with the pressure control system. Once the pump stops, the pressure drops; No water usage in the pump's outlet direction: The pressure is replenished quickly, causing the booster pump to go into standby mode again. The solution is to replace the one-way check valve with a high-quality one. In fact, most cases of intermittent operation are caused by the check valve; Water pipe leakage: Due to a drop in water pressure within the pump cavity, the pump restarts to replenish pressure. Because the water flow in the outlet direction is minimal, the pressure rises to the set value in a short time, causing the booster pump to stop and maintain pressure.
I've encountered this situation before. If the booster pump is idling and overheating, it's mostly due to a faulty pressure switch. This switch is supposed to automatically cut off power when the preset pressure is reached. If it's stuck or the contacts are welded together, the pump will foolishly keep running nonstop. Another possibility is air leakage in the pipeline, preventing the pressure from building up enough to trigger the shutdown command. Also, check the check valve—if it doesn't close tightly, water backflow causes pressure drop, making the pump run continuously. Last time I opened my own water pump and found the impeller jammed by debris, causing the motor to idle and generate heat through friction—the casing got so hot you could fry an egg on it. My advice: cut power immediately, first check the entire pipeline for leaks, then tap the pressure switch to see if it resets. If that doesn't work, call after-sales service right away—burning out the motor would mean much greater losses.
