All of the following are indications of partial restriction on high side except?

The correct answer is no refrigeration, as it is not an indication of a partial restriction on the high side of a refrigeration system. When there is a partial restriction on the high side, such as in a refrigeration system, other symptoms typically manifest, including high pressure buildup, high temperature at the condenser, and increased energy consumption.

High pressure buildup occurs because the refrigerant cannot flow freely through the system, causing an accumulation of pressure. Similarly, high temperatures at the condenser result from the refrigerant not being able to dissipate heat effectively, which can lead to overheating. Increased energy consumption is also common, as the compressor has to work harder to try to move the refrigerant through the restricted area.

In contrast, if there is no refrigeration, it may not necessarily indicate a partial restriction on the high side. Lack of refrigeration could be caused by a variety of other issues, such as low refrigerant levels, compressor failures, or electrical problems. Therefore, the absence of refrigeration does not directly correlate with a partial restriction scenario.