Error code

A.O. Smith heat pump water heater error code 031

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Is 031 on a A.O. Smith heat pump water heater an emergency?

Treat it as urgent — deal with it today. If water is reaching outlets, cords or the floor near anything electrical, switch off the breaker before you touch anything, and shut off the water to the appliance.

Take the photo. We’ll tell you what it is.

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What 031 means

“Water Leak”

— A.O. Smith, A.O. Smith Hybrid Electric Heat Pump Water Heater Service Handbook. Codes vary by model: check your heat pump water heater’s own manual.

Where 031 fits

In plain words, 031 is about water where it should not be — the machine has sensed a leak or an overfill and stopped.

Next to 031 in A.O. Smith’s table: 029 (Outlet temperature sensor failure) and 044 (SAC anode depleted).

What to try first

  • Turn off power at the breaker and check all connections and the tank for water.

Safety: If water is reaching outlets, cords or the floor near anything electrical, switch off the breaker before you touch anything, and shut off the water to the appliance.

How urgent is it?

At least TODAY. fixRAgent treats this code as needing attention today. It points at water where it should not be, overheating, a combustion or ignition safety shutdown, food that may be warming, or a wiring problem. This is fixRAgent’s reading, not the manufacturer’s. A photo can raise it — water near wiring, scorch marks, a gas smell — but a code never lowers what the photo shows.

Who to call

Plumber. Have the model and serial numbers from the label ready — a photo of the label works.

Recalls and manuals

Check whether your model is under a safety recall on the U.S. Consumer Product Safety Commission’s site: cpsc.gov/Recalls. Your owner’s manual is on A.O. Smith’s support site; search it with the model number from the label.