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Error code reference

Bradford White Water Heater Error Code 5 flashes (red)

Gas Control V2

Bradford White codesBradford White water heater codes

Gas Control V2: Electronics, sensor, or gas valve fault detected.

First step from the service manual

Check water temperature sensor and its connection for open circuits, shorts, or differences in resistance between the two sensor elements. Replace gas control.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What 5 flashes (red) means on a Bradford White water heater

A 5-flash red LED sequence on a Bradford White water heater signals a Gas Control V2 fault, which indicates the integrated gas control valve has detected a problem within one of three areas: the internal electronics, the water temperature sensor circuit, or the gas valve mechanism itself. The gas control unit on these heaters combines the gas valve, ignition control board, and temperature sensing into a single assembly, meaning a fault in any one of those subsystems triggers this same error code.

The primary diagnostic focus is the water temperature sensor, which uses two resistive elements to measure water temperature. If either element develops an open circuit, a short to ground, or if the resistance readings between the two elements differ significantly from one another, the gas control interprets this as a sensor fault and shuts down operation. The wiring harness and connector between the sensor and the gas control should be inspected for corrosion, loose pins, or damaged insulation before the sensor itself is condemned.

If the temperature sensor and its wiring check out within normal resistance specifications and the connections are secure, the fault likely lies within the gas control unit itself, either in its internal electronics or the valve mechanism. Because the gas control is a sealed, integrated assembly, internal electronic or valve faults cannot be repaired in the field. Replacement of the entire gas control unit is the required corrective action in that scenario.

Source: manufacturer service documentation.

Common causes of 5 flashes (red)

  1. 01

    Water temperature sensor fault

    Part replacement

    One or both resistive elements inside the temperature sensor may have failed, producing an open circuit, a short, or a measurable resistance difference between the two elements. This is the first component to test when this code appears.

  2. 02

    Loose or corroded sensor wiring connection

    Wiring / connection

    The connector between the temperature sensor and the gas control can develop corrosion, bent pins, or a loose fit over time. Inspect the connector carefully and reseat it firmly before replacing any parts.

  3. 03

    Damaged sensor wiring harness

    Part replacement

    The wiring between the sensor and the gas control may have a short to ground or an open caused by physical damage, heat exposure, or rodent activity. Visually inspect the full length of the harness for damage.

  4. 04

    Gas control internal electronics failure

    Part replacement

    If the sensor and all associated wiring test within normal parameters, the fault is likely inside the gas control unit itself. Internal circuit board failures within the gas control cannot be serviced in the field.

  5. 05

    Gas control valve mechanism fault

    Part replacement

    The valve portion of the integrated gas control assembly can develop internal mechanical or electrical faults that trigger this error. This condition also requires full gas control replacement.

See the test procedure for each cause

Frequently asked questions about 5 flashes (red)

What does 5 flashes (red) mean on a Bradford White water heater?
A 5-flash red LED sequence on a Bradford White water heater indicates a Gas Control V2 fault. This means the gas control unit has detected a problem in its internal electronics, the water temperature sensor circuit, or the gas valve mechanism. The heater will not operate until the fault is diagnosed and resolved. Start by inspecting the water temperature sensor and its wiring connections.
Can I fix the 5 flash error code myself?
A knowledgeable DIYer can perform the initial diagnostics, which include inspecting the temperature sensor wiring harness, checking for corrosion or loose connections at the sensor connector, and testing the sensor's resistive elements for opens, shorts, or imbalance between the two elements. However, if the gas control unit itself has failed, replacing it involves working with gas supply lines, which is a task best handled by a licensed plumber or gas technician. Gas valve work that is done incorrectly creates serious safety hazards.
Is it safe to use my water heater when it shows 5 red flashes?
No. When the 5-flash fault is active, the gas control has shut the heater down as a protective measure. You should not attempt to bypass this lockout or force the heater to operate. The fault could indicate a condition that, if ignored, poses a fire or gas leak risk. Leave the heater in its shut-down state until the fault is properly diagnosed and repaired.
Will resetting the water heater clear the 5 flash error?
A reset may temporarily clear the fault display, but if the underlying problem with the temperature sensor, wiring, or gas control electronics has not been corrected, the error will return. Repeated resets without addressing the root cause will not restore reliable operation and could mask a developing safety issue. Diagnosis and repair of the actual fault should be completed before returning the unit to service.
How much does it cost to repair a Bradford White water heater with a 5 flash error?
Repair costs vary depending on which component has failed. If the fix is a wiring repair or connector cleaning, costs may be minimal, primarily covering a service call fee ranging from around $75 to $150. A replacement temperature sensor is relatively inexpensive, typically in the $20 to $60 range for the part. A full gas control valve replacement is more significant, with parts generally ranging from $150 to $350 and labor adding another $100 to $200 depending on your region and the technician.

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