State Water Heater E169 Error Code — What It Means
E169 does not appear in published State Water Heaters fault code lists for gas or electric models. State uses different control systems across product lines, each with its own code set. If your display shows E169, verify the exact model number and control board type on the data plate. The code may belong to a third-party controller, a different brand, or a misread display. Without matching the code to your specific control family, any diagnosis would be guesswork.
Common Causes
- Incorrect brand or model identification The heater may be a different brand using State-compatible parts, or the model series uses a control system not documented under the E169 designation.
- Misread display LED segments or digits can fail partially, causing an E168, E196, or other valid code to display as E169.
- Third-party or aftermarket control board A replacement controller from a non-OEM supplier may use a fault code map that does not match State’s published lists.
- Control board firmware variant Some regional or private-label models use firmware revisions with codes not found in the standard State service manual.
Step-by-Step Fix
- Locate the data plate on the side or front of the tank and write down the complete model number, serial number, and control board part number if visible.
- Power off the unit at the circuit breaker or gas valve, wait 30 seconds, then restore power to see if the code clears or changes to a recognized fault.
- Check for partial display failure by watching the screen during startup; if segments are dim or missing, the code may actually be E168 or another number.
- Cross-reference the model number with State’s published control and system error code booklet or the diagram inside the heater’s access panel to confirm which code set applies.
- Contact State customer service or check the A.O. Smith family technical library online with your exact model and serial to request the correct fault code chart.
- Photograph the display and data plate if calling a technician so they can verify the code and control type before the visit.
- Do not replace parts based on generic E169 definitions from other brands, as component part numbers and fault logic differ across control families.
Parts Often Needed
| Part | Notes |
|---|---|
| Control board or gas valve assembly | Amazon | Only after confirming the exact part number from your model’s service manual and verifying E169 is valid for that control. |
| Display module | Amazon | If the screen shows garbled or incomplete digits, the display itself may need replacement rather than other components. |
When to Call a Pro
Call a licensed plumber or water heater technician immediately if you cannot find E169 in your model’s documentation. A pro can decode the control board in person, access manufacturer-only fault history logs, and confirm whether the code is legitimate or the result of a wiring fault or failed display. Attempting repairs without the correct fault definition risks replacing expensive parts unnecessarily and may void your warranty if the unit is still covered.