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Low-Pressure Controls Explained | Commercial Refrigeration

In this video, we break down how low-pressure controls work in commercial refrigeration systems — what they do, how to test them, and why they matter for protecting your compressor.
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We cover common failures, including stuck relays and cracked capillary tubes, and walk through how to properly set cut-in and cut-out ranges for different refrigerants. We also explain the pump-down cycle, why it’s critical to test on every PM and service call, and what symptoms to look for when a pressure control isn’t functioning correctly.

Whether you’re new to the trade or brushing up your skills, understanding how these controls are explained here can save your customer from a costly compressor replacement.

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