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Heating  Heating

Brand

AO Smith AO Smith List all brands

Type:

ATI-240H-N Indoor (T-H3J-DV) view ATI-240H-N Indoor (T-H3J-DV) List all types

Error code:

321
List all errors


Error code: 321

Cause of error code 321

Inlet thermistor failure

Solution for error code 321

• Check for connection/breakage of wires and/or debris on thermistor (Part #407, 408, 411, 715).


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