Wtimmins

Help!!! I tried to help our little elementary school with their paragon Kiln. (New elements, relays, thermocouple and a 3.0 Sentry controller (They sent the updrade, I didn't ask for it) So, everything back together, continuity check at each connection point and still, I get 'LAG' and alternating codes 121, 31 , and 95. From everything that Ihave been able to read at this point, it seems as though the LAG could be due to one of the lead wires shorting out. I still don;t know what the 121, 31 and 95 referes to...these are just the alternating numbers that th teacher has sent back to me after she tried to do a bisque fire and it will not rise to temp. Anything anyone can equip me with before I return to the school and try to figure out what is wrong despite all new components, would be very much appreciated!