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Is it possible for a DX R 410 coil to freeze a hydro coil downstream from it. We have had a hydro coil burst and explanation given was that the AC froze the heat coil. It seems strange to me but looking for other people's experience. Air handler is in a basement that is conditioned. There is no outside air connected to the ductwork. Outside air temperature at the time of incident was approx 40-45 degrees Fahrenheit. We did find that ac was on when it wasn't supposed to be.