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 Hi Don 
Living in a cold climate makes one conscious of 
condensation.  That poor frozen little Accu-Vote brought from 20F to 
probably 70+F would create all kinds of condensation on the circuit 
boards.  That's why they put little packages of silica gel into some 
electronic devices for shipping and storage.  Covered with moisture the 
circuit boards would either short out or cause erratic behavior.  A cold 
Accu-Vote should be warmed up for 2 hours before being turned on.  Twenty 
degrees F would not do good things for the life of the battery. 
It sounds like the read head is suspect.  I 
bet if you swapped the read head (for a proven one) it would work like a 
charm. 
My two cents worth 
Greg 
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