Bunn -O-MATIC ULTRA-1 - Manual (Page 20)

20
TROUBLESHOOTING (cont.)
Temperature Sensor Error
TEMPERATURE SENSOR SHORTED TEMPERATURE SENSOR OPEN
Left side Right side
Check wiring harness between
thermistor and control board
Left side Right side
Product not covering
back end of drum.
Drum temperature
falls below 9° F.
Replenish product
Thermistor unplugged
or break in wiring
Check thermistor
circuit
41084 102709