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July 9, 2025
PSC, ECM, Variable Speed: Motor Types, Troubleshooting & Longevity Tips for HVAC
The Kalos team members break down the essential differences between PSC, ECM, and variable speed motors in this comprehensive overview for HVAC technicians. Learn about blower and condenser fan motor types, understand how each motor technology handles static pressure, and discover why proper airflow management is critical for system longevity.
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This tech tip was written by Eric Kaiser from TruTech Tools. Thanks, Eric! Filling refrigerant recovery cylinders is a task HVACR technicians perform regularly, but figuring out how much refrigerant to safely put into a cylinder can still be confusing. The challenge almost always comes back to refrigerant density or specific gravity. Specific gravity, also […]
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Depending on what segment of the business you are in and your location, you either work on pump-down solenoid systems all the time, or YOU HAVE NO CLUE what a liquid line solenoid is. A liquid line solenoid valve (LLSV) is just a valve that opens and closes; it has a magnetic coil. Depending on […]
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Maintaining the correct vapor-liquid refrigerant balance is crucial for air conditioning and refrigeration system performance. Longer line sets hold more refrigerant, which increases the risk of liquid accumulating in the suction line or entering the compressor during off-cycles. Heat pumps are one common application that requires additional measures. Refrigerant flow reverses during heating, turning the […]
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