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Error code reference

Bradford White Water Heater Error Code 9 flashes red (V2)

Tank leakage detected by accessory module.

Bradford White codesBradford White water heater codes

Tank leakage detected by accessory module.

First step from the service manual

Check T&P valve. Check all water fittings. Pressurize and leak test tank.

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

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What 9 flashes red (V2) means on a Bradford White water heater

The 9 flashes red fault code on a Bradford White water heater (V2 control platform) indicates that an accessory module connected to the unit has detected water leakage somewhere in or around the tank system. This is not a combustion or ignition fault. Instead, it originates from an external leak detection accessory that monitors for the presence of water in areas where it should not exist. When the accessory module senses moisture or pooling water, it triggers this fault code and typically shuts down the heater to prevent further damage.

The most likely sources of the detected leak include the temperature and pressure (T&P) relief valve, which can weep or discharge if system pressure or water temperature exceeds safe thresholds. Supply and outlet water fittings, flex connectors, and dielectric unions are also common leak points, particularly in systems with age-related corrosion or improper installation. In more serious cases, the tank itself may have developed a pinhole or seam failure, which represents a non-repairable condition requiring full unit replacement.

Diagnosing this fault begins with a thorough visual inspection of the T&P valve and all water connections. If no visible leak is found, the system should be pressure-tested to locate a slow or intermittent leak that may not produce standing water under normal operating conditions. The accessory module and its sensor placement should also be inspected to confirm the sensor is properly positioned and has not been triggered by condensation or an unrelated moisture source.

Source: manufacturer service documentation.

Common causes of 9 flashes red (V2)

  1. 01

    T&P Relief Valve Leaking or Weeping

    Part replacement

    The temperature and pressure relief valve may be dripping or discharging due to excessive system pressure or water temperature. Check the valve and its discharge pipe for signs of moisture or active dripping.

  2. 02

    Loose or Corroded Water Fittings

    Part replacement

    Supply and outlet fittings, flex connectors, or dielectric unions can develop slow leaks over time due to corrosion, thermal cycling, or improper installation. Inspect all connections at the top of the tank and along supply lines.

  3. 03

    Tank Pinhole or Seam Failure

    Part replacement

    Internal tank corrosion can eventually produce small pinholes or seam failures that allow water to escape. If a pressure test confirms the leak originates from the tank body, the unit must be replaced rather than repaired.

  4. 04

    Accessory Leak Sensor Triggered by Condensation

    Wiring / connection

    In humid environments or during initial startup, condensation can collect near the sensor and trigger a false positive. Verify the sensor location and check whether the moisture is condensation rather than an active leak.

  5. 05

    Drain Valve Seeping

    Part replacement

    The tank drain valve at the base of the unit can develop a slow seep if the valve seat is worn or debris has prevented a full seal. Inspect the drain valve for any signs of moisture or mineral buildup around the fitting.

See the test procedure for each cause

Frequently asked questions about 9 flashes red (V2)

What does 9 flashes red (V2) mean on a Bradford White water heater?
Nine red flashes on a Bradford White V2 control indicate that an accessory leak detection module has sensed water somewhere around the unit. The heater shuts down in response to protect against water damage. This fault requires a physical inspection and pressure test to locate the source of the leak before the unit can be safely returned to service.
Can I fix the 9 flashes red fault myself?
Some causes, such as a loose fitting or a seeping drain valve, may be within reach of a skilled DIYer with basic plumbing tools. However, a failed T&P valve or a tank leak requires parts replacement, and a cracked or corroded tank requires full unit replacement. A thorough leak test should be performed before attempting any repair to correctly identify the source.
Is a 9 flashes red error on my Bradford White water heater a safety emergency?
It can be, depending on the source of the leak. A heavily leaking tank or a failed T&P valve can cause significant water damage or indicate unsafe pressure levels within the system. If you notice active water pooling, running water sounds, or a discharge from the T&P valve pipe, shut off the water supply to the heater and contact a technician promptly.
How much does it cost to repair a Bradford White water heater showing 9 flashes red?
Repair costs vary widely based on the cause. Replacing a T&P relief valve typically falls in the range of $75 to $200 including labor. Fixing a leaking fitting or flex connector may cost $50 to $150. If the tank itself has failed, full water heater replacement costs generally range from $800 to $2,000 or more depending on unit size, fuel type, and local labor rates.
Will resetting the water heater clear the 9 flashes red code?
Resetting the control may temporarily clear the fault code, but the code will return if the underlying leak has not been repaired. The accessory leak detection module will continue to trigger the fault as long as moisture is present at the sensor location. The root cause must be identified and corrected before a reset will result in normal sustained operation.

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