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.
No — this code is not a fault. 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 →“Time to Check Venting for Debris”
— 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, T118 is about venting — the draft or pressure switch did not prove that combustion gases are being pushed out.
Rheem gives 4 other venting and pressure codes for this gas water heater: A007 (Exhaust Switch open), A017 (High Flue Temp), A018 (Flue Temp Sensor open), A019 (Flue Temp Sensor shorted).
Next to T118 in Rheem’s table: T117 (Time to Drain and Inspect Tank) and T119 (Time to Clean Out the Condensate Drain Trap).
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 WHENEVER. This code is a mode, a reminder or a status message rather than a fault. It does not need a repair on its own. 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.