I don't think the 0 shouldn't happen at all - in theory.I have a setup that has worked for some years and suddenly had all sensors reading 0.0. I have no idea what causes this but it fixes itself if the power is turned off. Pressing reset is not enough and, while it is running OK at the moment, the fix may only last a few hours..I have wondered if it is being caused by one sensor because I have some format glitch appearing too. it seems to return four decimal places, i.e. 23.4500 and the last digit has to go on the next line of the LCD. This only happens with one reading, and a reset is enough to fix it. edit - I was wrong about 85, el Supremo is right
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