Key Takeaways Standard HVAC NTC thermistors read 10,000 ohms at 77°F (25°C): The resistance drops as temperature rises following a non-linear curve. Testing requires disconnecting the sensor from the control board first, because...
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Key Takeaways A TXV runs on a three way tug of war: The sensing bulb pushes the valve open while evaporator pressure and the superheat spring push it closed. Whatever pressure the valve feels underneath the diaphragm sets how much superheat it...
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Key Takeaways TXVs Control Superheat: These valves maintain constant superheat at the evaporator outlet to protect compressors 3 Operating Forces: Sensing bulb pressure (opening), evaporator pressure (closing), and spring tension (closing) work...
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Refrigerant Charging Adding Refrigerant to a Refrigeration and Air Conditioning System is known as Charging. There are many ways to do this depending on the system type, status of the system, and refrigerant type. This article will detail best...
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A Veteran Tech’s Guide to Systematic Diagnosis We have all seen a walk-in cooler. They come in every size imaginable and more. Walk-ins can be used to store food, ripen fruit, or even age products. The equipment in them can range from...
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