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Error code reference

Bradford White Water Heater Error Code 4 flashes (WR Electronic)

White Rodgers Electronic

Bradford White codesBradford White water heater codes

White Rodgers Electronic: Temperature cut-out limit reached causing shutdown; excessive temperatures may have been reached.

First step from the service manual

Shut off the control and reduce the water temperature. Thoroughly verify control operation, replace if exceeding setpoint.

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

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What 4 flashes (WR Electronic) means on a Bradford White water heater

The 4-flash error code on a Bradford White water heater equipped with a White Rodgers electronic control indicates that the temperature cut-out limit has been reached, triggering an automatic safety shutdown. This limit exists to prevent dangerously high water temperatures from developing inside the tank. When the control detects that tank temperature has exceeded a defined threshold, it cuts power to the burner assembly and enters a lockout state, signaling the fault condition through the 4-flash sequence on the status LED.

The White Rodgers electronic control continuously monitors tank temperature through a sensor. If the measured temperature climbs past the cut-out setpoint, the control interprets this as an unsafe operating condition and shuts down to protect both the appliance and the occupants. This can result from a thermostat that is set too high, a faulty control that is not regulating gas valve operation correctly, or a failing temperature sensor providing inaccurate readings to the control board.

Diagnosis begins by shutting off the control and allowing the tank to cool before reducing the temperature setpoint. Once the unit has cooled, the control's operation should be thoroughly verified to confirm it cycles the burner on and off at the correct temperatures. If the control is found to be allowing temperatures to exceed the setpoint during normal operation, the White Rodgers electronic control assembly should be replaced. Leaving the root cause unaddressed can result in repeated shutdowns or a genuine scalding hazard.

Source: manufacturer service documentation.

Common causes of 4 flashes (WR Electronic)

  1. 01

    Temperature setpoint set too high

    Wiring / connection

    If the water temperature dial or setpoint on the White Rodgers control is configured above the safe operating range, the tank can exceed the cut-out limit during normal heating cycles. Check the current setpoint and reduce it if it is above the recommended level.

  2. 02

    Faulty White Rodgers electronic control

    Part replacement

    A malfunctioning control board may fail to shut off the gas valve at the correct temperature, allowing the tank to overheat even when the setpoint is correct. If the unit repeatedly reaches the cut-out limit with a normal setpoint, the control itself is the likely cause and should be replaced.

  3. 03

    Gas valve not closing properly

    Part replacement

    A gas valve that sticks open or does not fully close on command from the electronic control will allow the burner to continue firing past the intended shutoff point, driving tank temperature into the cut-out range. Inspecting the valve for proper operation or replacing it may be necessary.

  4. 04

    Inaccurate temperature sensor

    Part replacement

    If the sensor feeding temperature data to the White Rodgers control is out of calibration or has drifted, the control may not respond at the correct temperature and the tank can overheat before a shutdown is triggered. Sensor accuracy should be confirmed as part of the control verification process.

  5. 05

    High-demand or extended heating cycle

    Wiring / connection

    In some cases, unusually high hot water demand followed by a long recovery cycle can push tank temperatures toward the cut-out threshold, particularly if the setpoint is near the upper end of the allowable range. Reducing the setpoint slightly often resolves this in high-usage situations.

See the test procedure for each cause

Frequently asked questions about 4 flashes (WR Electronic)

What does 4 flashes (WR Electronic) mean on a Bradford White water_heater?
The 4-flash code on a Bradford White water heater with a White Rodgers electronic control means the temperature cut-out limit was reached and the unit has shut down as a safety measure. The control detected that water temperature inside the tank climbed to an excessively high level. The heater will remain in lockout until the condition is addressed and the unit is restarted properly.
How do I fix the 4-flash error on my Bradford White water heater?
Start by shutting off the control and allowing the tank to cool completely. Once cooled, reduce the temperature setpoint on the White Rodgers electronic control. After restarting, closely monitor the unit to confirm the control is cycling the burner on and off correctly and not allowing temperatures to exceed the setpoint. If overheating continues, the electronic control assembly likely needs to be replaced.
Is the 4-flash error on a Bradford White water heater a safety concern?
Yes, this error indicates that water inside the tank reached a dangerously high temperature, which poses a scalding risk at fixtures and can stress tank components over time. The automatic shutdown is a built-in safety feature designed to prevent injury and equipment damage. The underlying cause should be identified and corrected before returning the unit to service.
Will resetting the Bradford White water heater clear the 4-flash code?
A reset may clear the lockout temporarily, but if the root cause is not corrected, the cut-out limit will be reached again and the 4-flash code will return. Simply resetting the unit without addressing the setpoint, control operation, or any faulty components is not a permanent fix. Always diagnose and resolve the cause of overheating before relying on a reset.
How much does it cost to repair a Bradford White water heater showing 4 flashes?
Repair costs depend on what is causing the overheating condition. If only a setpoint adjustment is needed, there is no parts cost involved. Replacing a White Rodgers electronic control assembly typically runs between $150 and $350 for the part alone, with additional labor costs if a technician is involved. A faulty gas valve replacement can range from $200 to $500 or more depending on the model and local labor rates.

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