When does the Trane demand defrost cycle typically end?

The Trane demand defrost cycle is designed to efficiently manage frost buildup on the outdoor coil of the heat pump. It typically concludes when the liquid off the outside coil reaches 47°F. This temperature indicates that the frost has been adequately removed and the system can return to normal heating operation. Maintaining performance and efficiency is essential in heat pump operation, especially during cold weather, and monitoring this specific temperature ensures that the system operates effectively without unnecessary energy loss or compromise in heating performance.

The other options do not reflect the specific operational parameters of the demand defrost cycle. For instance, ending the cycle at 32°F or when the indoor temperature drops below freezing would not align with the criteria necessary for ensuring efficiency and effectiveness during defrosting. Turning the heat pump off would not be a practical solution to dealing with frost, as it would prevent the system from maintaining indoor comfort and could lead to further efficiency issues.