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160 Part Number: 000015430 Rev 02 5/20
SYMPTOM
Alert icon on the display and the alert indicates a T1, T2,
T3, or T4 Fault.
CHECK PROCEDURE
Navigate to Menu/Service/Data/Real Time data/Time &
Temperature
NOTE: An open thermistor will display less than -10°F
(-23°C) and a shorted thermistor will display higher than
400°F (204°C).
Thermistor Test
1. Disconnect thermistor from control board and
measure resistance.
2. Measure temperature at the thermistor.
3. Compare measured resistance/temperature readings
to resistance/temperature relationship chart.
A. Within 10% of the published resistance value -
Thermistor is good.
B. Not within 10% of the published resistance
Control Board Test
1. Disconnect thermistor from control board - The
display temperature reading, dropping below -10°F
(-23°C) indicates the control board is good.
2. Short thermistor pins - The display temperature
reading, higher than 400°F (204°C) indicates the
control board is good.
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