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The DUCANE 15P86 is a defrost sensor harness designed for use in heat pump systems where accurate defrost cycle control is essential to system efficiency and compressor protection. This component monitors coil temperature and signals the defrost control board to initiate and terminate the defrost cycle. It ships as a complete harness assembly, simplifying replacement during service calls. HVAC technicians install this part when the existing sensor has failed, is damaged, or is causing erratic defrost cycling behavior. At 0.15 pounds and compact in form, it is a straightforward drop-in service part.
This defrost sensor harness is typically found in residential heat pump applications where the outdoor unit requires periodic defrost cycles during heating season operation. It connects between the outdoor coil and the defrost control board, providing the temperature signal needed to protect the system from ice buildup. When defrost cycles are too frequent, too short, or not initiating at all, this sensor harness is a common diagnostic replacement target for licensed HVAC technicians.
Designed as an OEM-style replacement defrost sensor harness for DUCANE heat pump systems. Refer to the equipment service manual or cross-reference the OEM part number 101334-09 to confirm fitment before installation.
Installation should be performed by a licensed HVAC technician. Disconnect power to the outdoor unit at the disconnect box before beginning any service work. Route the harness clear of moving components such as the fan blade and secure any loose wiring as required by the original equipment configuration. Verify sensor placement against the original mounting location on the outdoor coil before restoring power.
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