TM 5-3895-374-24-2 4-4-3.  Temperature Device Problem Cause Solution/Reference Temperature display reads high Thermocouple not connected Thermocouple lead broken Thermocouple failure Temperature display reads low Cable shorted Poor connections Failure of thermocouple Hot mix build up on temperature probe Temperature display erratic (changing) Cable shorted Broken wire or connections Contaminated contracts on J-P connections Moisture in J boxes 4-4-4.  Control Panel Problem Cause Solution/Reference All controls not working Control power disconnected Check voltage at terminal block TB100 TB 1-3 = 120Vac TB 2-3 = 120Vac See electrical drawing AA00303 page 4 - 7