Diagnosing a Heat Pump Defrost Sensor
Posted on:
Member Exclusive Content
Login & continue reading at acca.org »
A split system heat pump’s defrost sensor is used to detect ice buildup on the heat pump’s outdoor coil. When ice builds up on the coil, it reduces the heat pump’s ability to transfer heat, which can cause the unit to become less productive. The exact way in which a defrost sensor works can vary.
Manager of HVACR Education at Air Conditioning Contractors of America
Matt Akins is ACCA's Manager of HVACR Education. He can be reached at matt.akins@acca.org or 703-824-8867.
Latest posts by Matt Akins (see all)
- Matt, how can airflow measurements be used to diagnose duct leakage or restrictions? - February 26, 2026
- Matt, how does undersized or oversized equipment impact energy consumption and comfort levels? - February 12, 2026
- Matt, how does high static pressure impact system performance and component longevity? - January 29, 2026
Posted In: Aside, Technical Tips
