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Heating
Brand
U.S.Boiler Company
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Type:
K2-100-02
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Error code:
7
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Error code: 7
Cause of error code 7
Return sensor (10 KOhms) fault
Shorted or open return temperature sensor.
Solution for error code 7
Shorted or mis-wired return sensor wiring.
Defective return sensor.
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