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The reversing valve is in the 3 1/2 ton heat pump. The HVAC tech said that he could feel oil under the reversing valve and that is how he "traced" the leak. The system currently does not have any freon in it so the system will not run so I can not check for vibration or pressures. Could there have been something that he did when installing the new air handler and charging the system that would have caused a leak at the reversing valve? I wanted to leave fixing my system to the "pros" but I am getting the impression that all anyone is doing is guessing at parts then replacing. I believed that the air handler needed replaced since it was 25+ years old and looked it, but now I am not so sure what to believe. The tech's suggestions are outpacing my bank account. Is there any way to troubleshoot the leak myself? Can I visually see a difference between a connection with silver and 50/50?
Thanks for the help.
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