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Heating
Brand
U.S.Boiler Company
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Type:
K2-120-02
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Error code:
9
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Error code: 9
Cause of error code 9
DHW sensor fault
Shorted or open Domestic Hot Water (DHW) temperature sensor.
Solution for error code 9
Shorted or mis-wired DHW sensor wiring.
Defective DHW sensor.
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