Bradford White gas water heater status light: 10 red flashes, then a 3-second pause (Ultra Low NOx)
An abnormal combustion chamber temperature profile was seen during the heating cycle.
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.
What you see: 10 flashes, then a pause, repeating. Applies to: Bradford White Ultra Low NOx residential gas tank water heaters with the ICON System electronic gas control.
What it means
The manual’s wording: “Ten flashes and three second pause (LED red)” — ICON control by Resideo, V2, on Ultra Low NOx models.
An abnormal combustion chamber temperature profile was seen during the heating cycle.
What Bradford White tells the owner to do
Bradford White’s manual gives the owner no step of their own for this code: call for service.
semiatic gives no repair instructions of its own. The steps above are only the ones Bradford White addresses to the owner in its manual.
The repair Bradford White’s table gives — for the qualified person you call
Shown so you know what to expect, not as steps to do yourself: Bradford White reserves repairs to the gas control, burner and gas piping for a qualified service technician.
- clean all combustion air intakes to the appliance; clean the burner; remove all obstacles that may restrict air flow to the burner.
When to call a qualified service agency
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 manual, read on the date shown.
- 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.
The same pattern on other brands
The same count on another maker’s gas control can mean something else.