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John HVAC/R Evacuation Quiz June 25, 2021, 10:03 pm
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I received an email from a podcast listener with some furnace-related questions. Based on the nature of the questions, I figured it would be better to ask an experienced furnace tech. Benoît Mongeau agreed to help by answering the questions. My name is Matt and I am a newer tech (fully licensed this September, have […]
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The most common diagnosis with expansion valves is failed closed or restricted, resulting in underfeeding of the evaporator. The symptoms are low suction, normal subcooling, and high superheat when a TXV fails “shut,” but there are some other issues to watch for that can actually result in overfeeding the coil. Schrader in the Port The […]
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A while ago, I walked up on one of our managers who was talking to a junior tech diagnosing an intermittent controls issue on a pool heat pump. In the background, you could hear an EXTREMELY loud compressor. The junior tech had just been moving some wires around, and the next thing he knew, there […]
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