A.O. Smith Error Codes

Major water heater manufacturer producing residential and commercial tank and tankless water heaters. A.O. Smith is one of the top three water heater brands in North America.

1 error codes across 1 appliance types

Waterheater

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Code	Meaning	Severity
NO-HEAT	Something broke the heating circuit. On electric units, power either isn't reaching the elements or the elements themselves are toast. Gas units usually mean the pilot's out, the thermocouple gave up, or the gas valve stopped doing its job. Either way, no heat transfer is happening inside that tank. high	high