Snap a photo — see what it is, how urgent, who to call.
One photo of the problem. fixRAgent reads it and gives you a Triage Profile.
Triage a photo nowNo sign-up.
Treat it as urgent — deal with it today. If you smell gas, do not touch switches or try to relight anything: leave, and call the gas utility or 911 from outside.
Take the photo. We’ll tell you what it is.
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Managing this for someone else? Managers: set it up for your buildings →
Managing this for someone else? There is a version of this for whole portfolios.
Managers: set it up for your buildings →“Ignition lockout.”
— Rheem, Rheem Residential Super High Efficiency gas water heater Use & Care manual (AP21831 Rev 2), alarm and alert codes. Codes vary by model: check your gas water heater’s own manual.
In plain words, A001 is about ignition — the burner did not light, or the control saw a flame signal it did not expect.
Rheem gives 6 other ignition and flame codes for this gas water heater: A002 (Flame is not stable), A012 (Flame Detected During Standby/Disabled Mode), A027 (Flame present before ignit), A028 (Flame present w/o heating), A030 (Unit lost flame).
Next to A001 in Rheem’s table: A002 (Flame is not stable).
Safety: If you smell gas, do not touch switches or try to relight anything: leave, and call the gas utility or 911 from outside.
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.
Plumber. Have the model and serial numbers from the label ready — a photo of the label works.
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 Rheem’s support site; search it with the model number from the label.