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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Testing the Boiling Water Thermistor
Unplug the boiling water thermistor at the thermistor
wiring loom connector or control board plug socket and
using a multimeter on the kilo-ohms scale, measure
between the pins of the thermistor plug. As the
resistance of the thermistor will change according to its
temperature, the resistance measurements for the
thermistor will need to be checked against the
‘Thermistor Temperature/ Resistance Table’ located
below. For this reason it is best to remove the thermistor
from the dry well and compare the measured value to
the ambient air temperature which can be obtained
using a thermometer. When refitting the thermistor, into
the element well, ensure there is ample heat transfer
compound on the thermistor.
Thermistor Temperature / Resistance Table
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