You should never repair a coil, only replace it. What are your pressure readings? An undercharged system can result in the problem you're describing.
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I'm always finding trace leaks under service valve caps. I used to always seal the threads with leak lock and tighten 1/12th of a turn tight. Now I notice alot of manufacturer...
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High superheat and low suction pressure usually means undercharged. What's your delta t on the problem unit? Is it a txv metering device? That suction should be above 60psig,...
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I'm a fan on NY Thermal - http://www.nythermal.com/
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R-410A is a near azeotropic refrigerant mixture with a negligible temperature glide. There are no concerns about fractionalization should refrigerant loss occur, so R-410A ca...
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