How might an increase in temperature differential across a heat pump indicate a problem?

An increase in temperature differential across a heat pump can signal potential refrigerant issues because the temperature differential reflects how effectively the heat pump is removing heat from or adding heat to a given space. If the differential is higher than normal, it may suggest that the heat pump is struggling to move heat, which can be a result of inadequate refrigerant levels or a refrigerant leak. When the refrigerant level is low, the system cannot absorb or release heat efficiently, leading to a greater temperature differential. This inefficiency can result in the system working harder, increasing energy usage and potentially leading to system failure if not addressed.

In contrast, a normal operation would typically display a balanced temperature differential that aligns with manufacturer specifications, ensuring optimal performance. High energy efficiency would be represented by a stable and lower differential, not an increased one, and proper airflow is reflected through appropriate temperature readings rather than an unexpected increase in differential.