My nest was installed with no c wire and it lost power. At this point the tech looked at the wiring diagram in a/c unit outside but I do not know what he did. A/c worked but later nest had no power. I had turned off the pilot from furnace. I wonder if this affected.
Then a 2nd tech came and connected the brown wire to c (which was previously not connected) and the yellow wire to C also. Tech did not do anything to outside a/c and I am wondering if he needed to adjust the wiring at outside unit so that a/c works. Fan works, heater works but a/c does not turn on.
Thanks for any help figuring this out!
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