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Error code reference

Bradford White Water Heater Error Code 5 flashes (V1)

Temperature sensor fault due to damage or resistance out of range.

Bradford White codesBradford White water heater codes

Temperature sensor fault due to damage or resistance out of range.

First step from the service manual

Verify control is not wet or physically damaged. Turn set point knob to OFF then to PILOT and light pilot. Replace gas valve if five flash status persists.

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
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What 5 flashes (V1) means on a Bradford White water heater

The 5-flash error code on a Bradford White water heater signals a temperature sensor fault within the gas valve control assembly. The integrated gas valve on these units contains a temperature sensor that continuously monitors water temperature and communicates resistance values back to the control board. When the sensor's resistance falls outside the acceptable operating range, or when physical damage to the sensor or control circuit is detected, the system enters a fault state and displays the 5-flash status code to prevent unsafe operation.

The temperature sensor is embedded within the combination gas valve, which means the sensor and valve are typically serviced as a single unit. The fault can arise from a sensor that has drifted out of calibration, wiring that has been damaged by heat or moisture exposure, or a control assembly that has been physically compromised. Moisture intrusion into the gas valve control is a particularly common trigger, since water contact can alter resistance readings and cause the control to interpret a sensor fault even if the sensor itself is undamaged.

The primary diagnostic approach involves inspecting the control for visible moisture or physical damage before assuming internal component failure. The recommended reset procedure requires turning the set point knob to the OFF position, then cycling it to PILOT and relighting the pilot. If the 5-flash code persists after this procedure and no moisture or physical damage is present, the gas valve assembly requires replacement, as the sensor is not a separately serviceable component.

Source: manufacturer service documentation.

Common causes of 5 flashes (V1)

  1. 01

    Moisture or water on the gas valve control

    Wiring / connection

    Water contact with the control assembly can skew resistance readings and trigger a false sensor fault. Inspect the control face and surrounding area for any signs of condensation, drips, or flooding.

  2. 02

    Failed temperature sensor inside the gas valve

    Part replacement

    The temperature sensor is integrated into the gas valve and can fail by drifting outside its specified resistance range. Since the sensor is not separately replaceable, a failed sensor requires full gas valve replacement.

  3. 03

    Physical damage to the gas valve or control assembly

    Part replacement

    Impact damage, heat damage, or corrosion to the gas valve body or control module can cause sensor circuit failures. Visually inspect the valve and control for cracks, burn marks, or corroded connections.

  4. 04

    Damaged wiring or connections between sensor and control

    Wiring / connection

    Heat exposure or abrasion can damage the wiring harness connecting the temperature sensor circuit to the control. Check all visible wiring for insulation damage, pinching, or loose connections.

See the test procedure for each cause

Frequently asked questions about 5 flashes (V1)

What does 5 flashes (V1) mean on a Bradford White water heater?
Five flashes on a Bradford White water heater indicates a temperature sensor fault. The gas valve's integrated temperature sensor is either damaged or reading a resistance value outside the acceptable range. The unit will not heat water normally while this fault is active. The gas valve assembly typically requires replacement to resolve the issue.
Can I fix the 5-flash error on my Bradford White water heater myself?
The first step is to check the gas valve control for any moisture or visible physical damage, which does not require tools or parts. You should then turn the set point knob to OFF, cycle it back to PILOT, and relight the pilot to see if the fault clears. If the 5-flash code returns after this reset, the gas valve assembly needs to be replaced, which involves working with the gas supply line and is typically a job for a licensed plumber or gas appliance technician.
Is a 5-flash error on a Bradford White water heater dangerous?
The 5-flash fault code is a safety lockout, meaning the heater has stopped normal operation to prevent potentially unsafe conditions from a faulty temperature sensor. The unit will not fire the main burner while this code is active, so the immediate risk is loss of hot water rather than a hazardous condition. However, any time gas appliance components are being inspected or replaced, standard gas safety precautions apply, including ensuring the gas supply is shut off before beginning work.
Will resetting my Bradford White water heater clear the 5-flash code?
A reset by turning the set point knob to OFF and then to PILOT may clear the code if the fault was triggered by a temporary condition such as moisture on the control. If the temperature sensor has actually failed or the gas valve is damaged, the 5-flash code will return after the reset and the gas valve assembly will need to be replaced. Repeated resets without addressing the root cause will not resolve the underlying fault.
How much does it cost to repair a Bradford White water heater showing 5 flashes?
If the issue is resolved by simply drying out the control or cycling the knob, there is no parts cost involved. If the gas valve assembly requires replacement, parts costs typically range from $150 to $400 depending on the specific model, with labor adding an additional $100 to $250 or more depending on your region and the technician. Total repair costs for a gas valve replacement generally fall in the range of $250 to $650.

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