93
Check method
Error type
Cause
Check method
Remark
Check if the thermistor connector or the harness
terminal is wet due to any reason, including leakage.
If the same phenomenon, replace the thermistor.
If the trouble continues despite the checking of above
items, replace the PCB.
0kΩ
Defect
< Check short-circuit of the space heating return thermistor>
Defective
thermistor
Other
trouble
Defective
thermistor
connector
Thermistor
Defective
PCB
©
Navien
Ameri
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CH
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Summary of Contents for CH-180
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