mypros+
Error code reference

Bradford White Water Heater Error Code 2 flashes (V1)

Weak pilot signal detected; system will reset when pilot flame is sufficient.

Bradford White codesBradford White water heater codes

Weak pilot signal detected; system will reset when pilot flame is sufficient.

First step from the service manual

See service procedure ED-IV (thermopile failure), ED-II (unstable pilot or pilot tube blocked/restricted).

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

MyPros+ Max

Get the full diagnostic procedure for 2 flashes (V1).

  • 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
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What 2 flashes (V1) means on a Bradford White water heater

The 2-flash error code on a Bradford White water heater indicates that the control system has detected a weak pilot signal from the thermopile assembly. The thermopile is a thermoelectric device that converts heat from the pilot flame into a small DC voltage, typically in the millivolt range, which powers the gas valve control circuit. When the thermopile output falls below the minimum threshold required to hold the main gas valve open, the control module registers this condition and displays the 2-flash sequence. The system is designed to attempt an automatic reset once the pilot flame strength returns to an acceptable level.

Two primary service procedures apply to this fault condition. Service procedure ED-IV addresses thermopile failure, which occurs when the thermopile itself has degraded and can no longer generate sufficient millivoltage even with a strong, stable pilot flame. Service procedure ED-II covers unstable pilot conditions and physical restrictions in the pilot tube. A blocked or partially restricted pilot tube reduces gas flow to the pilot burner, resulting in a weak or inconsistent flame that cannot adequately heat the thermopile junction.

Common root causes include thermopile degradation from age or contamination, debris or mineral deposits partially blocking the pilot orifice or tubing, improper pilot flame positioning caused by a bent or misaligned pilot hood, and draft conditions that disrupt flame contact with the thermopile tip. Diagnosing the fault requires measuring thermopile output voltage under load to distinguish between a failing thermopile and an inadequate pilot flame supply.

Source: manufacturer service documentation.

Common causes of 2 flashes (V1)

  1. 01

    Blocked or restricted pilot tube

    Wiring / connection

    Debris, mineral deposits, or corrosion inside the pilot tube or orifice can reduce gas flow, causing a weak pilot flame that generates insufficient thermopile voltage. Inspect the pilot orifice and tubing for visible blockage and check for consistent flame shape and color.

  2. 02

    Degraded or failing thermopile

    Part replacement

    Thermopiles wear out over time and lose the ability to generate adequate millivoltage even when the pilot flame appears normal. Testing thermopile output voltage under load will confirm whether the component has fallen below the minimum operating threshold.

  3. 03

    Unstable pilot flame

    Wiring / connection

    Drafts, fluctuating gas pressure, or a partially obstructed combustion air supply can cause the pilot flame to flicker or shift position, reducing consistent heat transfer to the thermopile tip. Observe the flame behavior with the access cover removed to identify instability.

  4. 04

    Misaligned pilot hood or thermopile tip

    Wiring / connection

    If the pilot hood is bent or the thermopile tip has shifted out of the flame path, the thermopile will not receive adequate heat even with a strong pilot flame. Visual inspection of the pilot assembly alignment is part of the ED-II diagnostic procedure.

  5. 05

    Low gas supply pressure

    Wiring / connection

    Insufficient gas pressure at the unit can reduce pilot flame size below operational requirements. This condition may also affect other gas appliances on the same supply line and requires pressure testing at the unit inlet.

See the test procedure for each cause

Frequently asked questions about 2 flashes (V1)

What does 2 flashes (V1) mean on a Bradford White water heater?
The 2-flash code indicates that the control system has detected a weak pilot signal, meaning the thermopile is not producing enough voltage to keep the gas valve circuit satisfied. The system monitors thermopile output continuously and triggers this fault when the signal drops below the required threshold. Bradford White service procedures ED-IV and ED-II are the designated diagnostic paths for this condition, covering thermopile failure and pilot tube restrictions respectively. The unit will attempt an automatic reset once a sufficient pilot signal is restored.
Can I fix the 2-flash error on my Bradford White water heater myself?
Some causes of the 2-flash code, such as a dusty or partially blocked pilot orifice, can be addressed by a knowledgeable DIYer with proper attention to gas appliance safety procedures. However, testing thermopile output voltage requires a multimeter and some familiarity with reading millivolt-range DC signals. Thermopile replacement is a moderately straightforward repair, but any work involving gas connections or the gas valve should be performed carefully and the area checked for leaks after reassembly. If you are not comfortable working with gas appliances, a licensed technician is the safer option.
Is the 2-flash error on a Bradford White water heater a safety concern?
The 2-flash fault is a protective response built into the control system to prevent the gas valve from operating without a confirmed pilot signal, which is a safety function. The heater will not fire the main burner if the thermopile signal is insufficient, reducing the risk of unburned gas release. While the fault itself is not an emergency, a consistently weak or failing pilot system should be diagnosed and corrected promptly to restore reliable and safe operation.
How much does it cost to repair the 2-flash error on a Bradford White water heater?
Repair costs depend on the root cause identified during diagnostics. If the issue is a restricted pilot tube that only requires cleaning, costs may be limited to a service call fee, typically in the range of $75 to $150 or more depending on your area. Thermopile replacement parts generally cost between $15 and $50, with total repair costs including labor ranging from $100 to $250 or higher. If the gas valve itself is implicated in the fault, that component is significantly more expensive to replace.
Will resetting my Bradford White water heater clear the 2-flash error code?
The Bradford White 2-flash fault is designed to reset automatically once the thermopile generates a sufficient pilot signal, so a manual reset may temporarily clear the display. However, if the underlying cause, such as a degraded thermopile or blocked pilot tube, is not corrected, the fault will return. Repeated occurrences of the 2-flash code are a reliable indicator that diagnosis using procedures ED-IV or ED-II is needed rather than continued resetting.

Related Bradford White water heater codes

All Bradford White water heater codes
View all 98 Bradford White water heater codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass