Why does the booster pump always make abnormal noises when no water is discharged?
2 Answers
It is because the water pipe of the pump is leaking, and another reason is that there is a problem with the pressure system. Specific principle: When the work reaches a certain level, the water pump will stop working. Once the pump stops, the pressure disappears again, which indicates a problem with the system. If the water pipe of the pump leaks and the water output is relatively small, causing the pressure to rise to the preset pressure value in a short time, abnormal noises will occur at this time. Function of the booster pump: The function of the car booster pump is to increase the power of the engine. At this time, the liquid on the impeller will flow around the blades. During the flow process, the liquid's effect is to generate a lift force beneficial to the blades. The blades generate a force of the same magnitude but opposite direction to this lift force, increasing both the kinetic energy and pressure of the liquid. The air booster pump utilizes a large-area piston with low pressure to generate high-pressure liquid in a small-area piston.
As an experienced technician in repairing booster pumps, I've handled many similar issues. When a booster pump makes abnormal noises without water, it's primarily due to dry running. Booster pumps are designed to move liquids – without water flow in the system, the pump operates dry, causing its impeller and bearings to rub against air or residual liquid, producing rattling or humming sounds. This often occurs from air pockets trapped in pipelines (air locks) or intake blockages preventing water entry. Prolonged operation in this state wears pump components like deformed bearings or damaged impellers. My recommendation: First, power off the pump and open the system's bottom air release valve to bleed air, then inspect water inlets for debris blockage. If DIY troubleshooting fails, have a professional test pump pressure and seals – ignoring these minor noises could halve the pump's lifespan. Replacing the pump head or installing a pressure relief valve may also help. Addressing this early saves both money and hassle.
