3-Phase HVAC Contactor Failure – Burned Coil Destroyed a $7,000 Compressor
Автор: Dallas Cool Air
Загружено: 2026-02-27
Просмотров: 17
Описание:
This 3-phase contactor failure caused a $7,000 compressor failure. In this video, I take the contactor apart to show the burned-open coil winding and damaged contacts that led to the compressor being destroyed.
Single-phase contactors typically fail at the contacts. However, 3-phase contactors often fail in the coil, the contacts, or both at the same time. When the coil burns open or the contacts become severely pitted or welded, it can create serious electrical issues that damage expensive components like compressors.
In this breakdown, we look at:
A burned-open coil winding
Contact surface damage
Proper meter interpretation (OL = no ohms / open line)
Why this failure can lead to catastrophic compressor damage
Understanding how and why contactors fail can help prevent major HVAC system damage and expensive repairs.
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