THis was to be a day of working on pictures. Libbie called to tell me the aux heater was on even though the temperature was 26 degrees. I drove over there and looked at it myself. Started building a second LOGE so I could debug the problem. Had trouble bringing up the second LOGE because the configuration silicon fuse was set to clock divided by 8. I wired up the JTAG as an ISP programmer. It didn't work the first time. found I counted pins wrong on the AVR. Fixed the wriing and sucessfully programmed the fuse and the unit worked correctly. Tried all sorts of machinations to get the thing to fail. Rigged it so that it was 26 degrees with the juper in and 22 degrees without the jumper to simulate outdoor temps. It did not fail. Work into the evening when it got cold. Built some probes and put one outside when it was 25 degrees. Just by accident I started looking at variable values with the JTAG and discovered the negative temperatures were not being handled correctly. When it is below 32F, it is negatice Centigrade temps. The probe only does centigrade. Made a trip to the greenhouse at 11 PM and retrieved the card for programming. Brought it back out there at midnight and hooked it up. The temp was 27. The pushbutton readout was always reading 32. Went home at 12:30 midnight but at least the big heater was on. Dinner was shrimp jumbalaya.