A.O. Smith Heat Pump / Hybrid Water Heater Error Codes

A.O. Smith’s hybrid (heat pump) water heaters, including the Voltex line, display numeric error codes on the control panel — separate from the flash-code system used on standard gas tank models. Confirmed code numbers circulating in real searches include 084, 081, 31, and ECC, though a full manufacturer-published meaning for each hasn’t been independently verified here yet.

Illustration of a heat pump water heater's control panel mounted on top of the tank. — Illustration of a heat pump water heater’s control panel mounted on top of the tank.

We’re deliberately not guessing at what each of these codes means until we’ve verified it against A.O. Smith’s own model-specific manual. A wrong “fix” for a heat pump refrigerant or electrical fault is worse than no answer — check back as we confirm each code, or check your model’s manual directly in the meantime.

Codes at a Glance

Code	Meaning
ECC	Referenced in real Autocomplete suggestions for this model line; meaning not yet independently confirmed — check your unit’s manual for the exact meaning.	Guide coming soon
084 / 081	Referenced in real Autocomplete suggestions; meaning not yet independently confirmed.	Guide coming soon
31	Referenced in real Autocomplete suggestions; meaning not yet independently confirmed.	Guide coming soon

FAQ

Where can I find the official error code list for my A.O. Smith hybrid unit?

Check the manual that came with your specific model, or A.O. Smith’s support site for hybrid/Voltex units — code meanings can vary by model generation.

Written by HotWater Decoded — water heater repair specialists. Technically reviewed by a licensed technician on our team.

Sources

Google Autocomplete data for A.O. Smith hybrid/heat pump error code searches