What temperature determines the defrost termination on a heat pump using time initiated temperature?

The temperature that determines the defrost termination on a heat pump using time initiated temperature is the outdoor coil. In heat pump systems, defrost cycles are critical to maintaining efficiency during colder weather conditions when frost can build up on the outdoor coil.

When the outdoor coil reaches a certain temperature, the heat pump's system recognizes that frost has formed, and it initiates a defrost cycle. This cycle continues until the outdoor coil temperature rises adequately to melt the frost. Once the temperatures reach a predetermined point, the system can terminate the defrost cycle, allowing the heat pump to return to its normal heating operation.

Maintaining the correct temperature control helps prevent excessive energy consumption, ensuring that the heat pump operates efficiently while maximizing performance and protecting the system from potential damage due to ice buildup.