What is often a sign of a malfunctioning pump?

Heating of the pump casing is often a clear indicator of a malfunctioning pump. When a pump operates properly, it is designed to remain at a stable temperature due to efficient functioning and appropriate cooling. However, if the casing heats up, it may suggest that the pump is experiencing excess friction or is working too hard due to clogging, wear, or other mechanical issues. Overheating can lead to more severe problems, such as damage to the pump components or failure, which is why it is a critical sign that maintenance or further inspection is needed.

In contrast, consistent, quiet operation would typically indicate that the pump is functioning well and efficiently. Higher than normal flow rates may not necessarily signal a malfunction but could indicate shifts in the system or configuration changes. Excessive voltage input might be concerning in terms of electrical performance but doesn’t directly relate to pump function unless it causes overheating or tripping. Thus, the heating of the pump casing is the most direct signal of potential failure, highlighting the need for attention and maintenance to ensure the pump operates effectively.