Gas Valve Electronic Fault Detected: What It Means
On this page (4 sections)
The Short Answer: On Bradford White gas tanks with a Honeywell thermopile-powered gas control, seven flashes followed by a three-second pause means “gas control electronic fault detected.” The manufacturer lists two causes: the control needs to be reset, or it is wet or physically damaged. One reset is reasonable. If the code returns, the gas control is replaced by a qualified technician.
What the flash codes mean on this control
The table below is from Bradford White’s service manual for its FVIR atmospheric gas models (opens in a new tab) (manual 238-51542-00A). Codes repeat with a three-second pause between them.
| Green LED | Control status (per manual) | Listed causes |
|---|---|---|
| Off | Normal operation, or pilot not lit | Light the pilot if needed |
| 1 flash | Normal; control powered | None |
| Solid on | Knob recently turned to OFF | Wait for the LED to go out before relighting |
| 2 flashes | Weak pilot signal | Thermopile, unstable or restricted pilot, or an opened thermal switch |
| 3 flashes | Insufficient water heating | Temperature sensor out of calibration |
| 4 flashes | Excessive tank temperature; must be reset | Temperature sensor or gas control |
| 5 flashes | Thermostat/well sensor fault | Damaged sensor or sensor resistance out of range |
| 6 flashes | Water leak detected (accessory module) | Water in the drain pan or water dam |
| 7 flashes | Gas control electronic fault | Control needs reset, or control wet or damaged |
| 8 flashes | Pilot remains on with knob at OFF | Pilot valve stuck open; replace control |
Other brands that use a similar Honeywell (Resideo) control, such as some A. O. Smith, State, and Rheem-family models, may use the same or a different chart. Confirm against the label on your heater or the manual for your model number before relying on any flash count; what a flashing green light means covers the normal heartbeat pattern.
What you can check safely
- Count the flashes twice and note the pause, so you are sure it is seven.
- Look for water on or around the gas control, dripping from the top of the tank, or in the drain pan. A wet control is one of the two listed causes, and water often comes from a leaking fitting or relief valve above it.
- Reset once using the lighting label. Turn the control knob to OFF, wait until the status light goes out, then follow the lighting instructions printed on the heater. Do not repeat this over and over.
- Watch whether the code returns after a normal heating cycle. Write down when it came back.
What the technician will check
A technician will look for moisture or physical damage at the control and its wiring connections, confirm the thermopile is producing enough power, and check the temperature sensor. If the control is dry, connections are sound, and the electronic fault returns after a reset, Bradford White’s manual calls for replacing the gas control. Replacement controls must match the heater model, gas type, and FVIR design, and the gas connections are leak-tested afterward. This is licensed gas work in most areas.
If water reached the control from a leaking tank, fix the leak source first; a leaking tank means replacing the heater rather than the control. Nearby problems are covered in a gas water heater that will not stay lit and Bradford White weak pilot signal.
Frequently Asked Questions
Q: Will a reset fix an electronic fault? A: Sometimes. The manual lists “control needs to be reset” as the first cause, so a single reset following the lighting label is appropriate. A code that returns means the control is wet, damaged, or failing.
Q: Is seven flashes the same on every water heater? A: No. Flash charts vary by control generation and manufacturer, and some electric heaters use flash counts with entirely different meanings. Use the chart on your heater’s label or in its manual.
Q: Is it safe to keep using the heater with this code? A: With this code the control shuts off the burner, so there is no hot water but no active burner either. If you smell gas at any point, leave and call the utility.
Manuals and supporting references
These links distinguish general safety information from model-specific documentation. A manual directory helps you locate your unit’s instructions; it does not establish that every model uses the same parts, codes, or test values.
- Bradford White service manual 238-51542-00A: Honeywell gas control troubleshooting chart (opens in a new tab)Bradford White FVIR atmospheric gas models listed on the manual cover (RG2 and LG2 series) with the Honeywell gas control.
- PG&E: recognizing and responding to a gas leak (opens in a new tab)Emergency actions for suspected fuel-gas leaks.
- Bradford White: find your water heater manual (opens in a new tab)Use the model and serial number to locate the correct documentation.
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