Bradford White gas water heater status light: 1 flash every second
ICON control by Resideo, V2: Not an error: the main valve is open and the main burner is lit, heating the water.
ICON control by SIT: Not an error: the main valve is open and the main burner is lit. Not a fault.
If you smell gas
Stop: do not relight or troubleshoot anything. Bradford White’s own words (first page of both Installation and Operation Manuals, 238-51007-00R and the Ultra Low NOx 238-53393-00K):
- DO NOT try to light any appliance.
- DO NOT touch any electrical switch.
- DO NOT use any phone in your building.
- Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
- If you cannot reach your gas supplier, call the fire department.
Calling from a neighbor’s phone means leaving the building first.
Bradford White’s manual has 2 gas controls with a table for this pattern, and they do not all mean the same thing: the full wording for each is below.
What you see: one flash every second, over and over. Applies to: Bradford White residential gas-fired tank water heaters with the ICON System electronic gas control.
What it means, by gas control
ICON control by Resideo, V2
The manual’s wording: “One flash every second (LED green)”.
Not an error: the main valve is open and the main burner is lit, heating the water. The control shuts the burner off by itself when the water reaches the set temperature.
Not a fault.
ICON control by SIT
The manual’s wording: “One flash every second”.
Not an error: the main valve is open and the main burner is lit. The thermostat is calling for heat and the heater is in a heating cycle.
Not a fault.
What Bradford White tells the owner to do
Bradford White’s manual gives the owner no step of their own for this code: it is normal operation.
semiatic gives no repair instructions of its own. The steps above are only the ones Bradford White addresses to the owner in its manual.
When to call a qualified service agency
This pattern is normal operation. If the light shows a fault code instead, or you have no hot water with the light normal and the knob set correctly:
Bradford White’s manual: “CAUTION: For your safety, do not attempt repair of combination gas control, burners or gas piping. Refer repairs to a qualified service technician.” Its FAQ adds: “If you are experiencing operating issues with your water heater, please contact a plumbing professional.”
Source
Bradford White’s own manuals, read on the date shown.
- Bradford White Corporation: Gas-Fired Water Heater Installation and Operation Manual (238-51007-00R, REV 07/26), “Troubleshooting — ICON System Electronic Gas Control” (Resideo V1, Resideo V2, SIT) — Bradford White residential gas-fired tank water heaters with the ICON System electronic gas control. docs.bradfordwhite.com Checked 2026-09-29.
- Bradford White Corporation: Ultra Low NOx Gas Water Heater Installation and Operation Manual (238-53393-00K, REV 08/26), “Troubleshooting — Resideo V1” and “Troubleshooting — Resideo V2” — Bradford White Ultra Low NOx residential gas tank water heaters with the ICON System electronic gas control. docs.bradfordwhite.com Checked 2026-09-29.