3/16 is not generally used on buckets because you don't have enough drop in elevation (or have mechanical vacuum).
That being said, was the sap flowing out the bottom of the tube? If yes, just wait until you get more favorable weather. If the temps there in Tennessee below freezing over night and in the 40's during the daytime and the trees had time to thaw you may have another issue, like were there drill shavings left in the taphole? To remove them, do not blow into the hole, use a little twig to clear, and use a fresh twig on each hole.