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Error code reference

Bradford White Water Heater Error Code 4 flashes red (V2)

Temperature cut-out limit reached.

Bradford White codesBradford White water heater codes

Temperature cut-out limit reached.

First step from the service manual

Check the valves and water temperature sensor. Reduce water temperature setpoint. Thoroughly check main valve operation and water temperature control before leaving. Replace gas control.

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

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What 4 flashes red (V2) means on a Bradford White water heater

The 4 flashes red (V2) error on a Bradford White water heater signals that the temperature cut-out limit has been reached. This is a protective shutdown condition triggered by the gas control valve's internal sensing circuitry when water temperature climbs to an unsafe level. The gas control valve monitors water temperature continuously, and when readings exceed the allowable threshold, the control cuts off gas flow to the burner and stores this fault code to alert the technician.

The primary components involved in this fault are the gas control valve assembly and the water temperature sensor. The temperature sensor feeds real-time readings to the gas control, and if the sensor is sending an inaccurate high reading or if the water has genuinely overheated, the cut-out limit activates. A setpoint that is configured too high is a straightforward cause, but so is a malfunctioning main valve that fails to modulate gas flow correctly, allowing excessive burner output and runaway water temperature.

Before leaving the unit, thorough verification of both the main valve operation and the water temperature control circuit is required. If the setpoint is confirmed to be within safe range and the temperature sensor checks out, the gas control valve itself may be faulty and require replacement. A failed gas control can misread temperatures, fail to shut off the burner at the correct time, or both, making it a credible suspect when other components test properly.

Source: manufacturer service documentation.

Common causes of 4 flashes red (V2)

  1. 01

    Water temperature setpoint too high

    Wiring / connection

    If the temperature setpoint on the gas control is configured above the safe operating range, the unit can heat water until the cut-out limit triggers. Lowering the setpoint to the recommended level is the first corrective step.

  2. 02

    Faulty water temperature sensor

    Part replacement

    A temperature sensor sending an incorrect high-temperature reading to the gas control will cause the control to activate the cut-out limit even when actual water temperature is normal. Inspect the sensor and verify its readings against the actual water temperature.

  3. 03

    Main valve not operating correctly

    Part replacement

    A main gas valve that fails to modulate or shut off properly can allow excessive burner output, driving water temperature beyond the cut-out threshold. Thorough operational testing of the main valve is required before clearing this fault.

  4. 04

    Failed gas control valve

    Part replacement

    The gas control valve integrates temperature sensing, setpoint control, and gas regulation in one assembly. Internal failure of the gas control can cause it to misread temperatures or fail to cut off gas at the correct point, triggering this fault code.

  5. 05

    Sediment buildup in the tank

    Wiring / connection

    Heavy sediment accumulation at the bottom of the tank can create localized hot spots near the thermostat bulb or temperature sensor, causing artificially elevated temperature readings that trigger the cut-out limit.

See the test procedure for each cause

Frequently asked questions about 4 flashes red (V2)

What does 4 flashes red (V2) mean on a Bradford White water_heater?
The 4 flashes red (V2) code means the gas control valve detected that the water temperature reached the cut-out limit and shut the burner down as a safety measure. This protective function prevents the water from exceeding safe temperature thresholds. The fault points to the water temperature sensor, the main valve, or the gas control valve itself as the likely source of the problem.
Can I fix the 4 flashes red (V2) error myself?
A homeowner can safely check and reduce the temperature setpoint on the gas control, which resolves the fault if the setpoint was simply configured too high. However, diagnosing a faulty temperature sensor, testing main valve operation, or replacing the gas control valve requires technical knowledge and is best handled by a licensed technician. Do not return the unit to service without confirming that the main valve and temperature control are both operating correctly.
Is it safe to use my water heater when it shows 4 flashes red (V2)?
The water heater has shut itself down and will not produce hot water while this fault is active, so there is no immediate burn hazard from the heater operating. However, the underlying cause of the overtemperature condition must be identified and corrected before the unit is restarted. Running the heater without resolving the root cause risks repeated overtemperature events and potential damage to the tank or connected plumbing.
Will resetting the water heater clear the 4 flashes red (V2) error?
Resetting the gas control may temporarily clear the fault and allow the burner to restart, but the error will return if the underlying cause has not been corrected. If the main valve is not operating properly or the temperature sensor is faulty, the cut-out limit will trigger again. Always diagnose and correct the root cause before relying on a reset as a fix.
How much does it cost to repair the 4 flashes red (V2) error on a Bradford White water heater?
Repair costs vary depending on what component is at fault. If only a setpoint adjustment is needed, there is no parts cost beyond a service call, which typically ranges from $75 to $150. Replacing a water temperature sensor generally costs $50 to $150 in parts plus labor. A gas control valve replacement, which is the most involved repair, typically ranges from $200 to $500 or more depending on the model and local labor rates.

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