Heating

Brand

AO Smith

AO Smith

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Type:

ATI-340H-N Indoor (T-H3S-DV)

ATI-340H-N Indoor (T-H3S-DV)

Error code:

751
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Error code: 751

Cause of error code 751

Miscommunication between water heater and temperature controller (Indoor models only)

Solution for error code 751

• Inspect the connections between the water heater and temperature controller.
• Check the power supply of the water heater

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