HVAC Word Of The Week

Zoetrope – A blended refrigerant that never mixes chemically. As a result it evaporates and condenses over a temperature range, called the glide. Therefore, zoetropic refrigerants must always be charged in the liquid state. We explain this and much much more in our HVAC Technician Course.

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HVAC Leak Detection – Everything Leaks

Every air conditioning system leaks whether it is one ounce per year or one ounce every thousand years. The leaks are caused by cracks, bubbles, impurities, and other flaws in the brazing, joining, or manufacturing process. While they may not be detectable, they are leaks nonetheless and will eventually become detectable given enough time. The…

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Heat Pump Reversing Valve

Reversing valves don’t often fail, but when they do they can cause a lot of confusion while troubleshooting. There are three main things that can cause a reversing valve to malfunction: The valve is stuck in the heating or cooling position. The coil is defective. The valve is leaking internally. 1. The valve is stuck in…

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Heat Pump Defrost Control Boards Step-by-Step

By Ron Walker Winter will soon be upon us and it is time to brush up on our heat pump defrost controls. Here is a quick review of what you need to know. This is a general overview and not brand specific. Defrost Control Board Operation The first thing to remember is that the heat…

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Classroom Tour

Check out our classroom tour here. You can learn to become an HVAC technician in less than one year. Begin at any time and study at your own pace. Keep your current job and learn a new career at the same time. Access to your course is available 24 hours a day. Supplementary videos will reinforce…

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