Bradford White Water Heater Error Code 6 flashes

Six flashes on a Bradford White water heater indicate that the accessory leak detection module has found an excessive amount of water in the drain pan or water dam beneath the unit. The moisture-sensing contacts in the pan have been bridged by standing water, triggering the fault. This code is specifically tied to the optional accessory leak detection module and will not appear on units without that module installed.

Yes, this code should be treated as a serious warning because a water leak near a water heater can cause structural damage to your home and, depending on the source, may indicate that the unit is operating at unsafe pressure or temperature levels. A faulty T&P valve in particular is a safety concern that requires prompt attention. Do not ignore standing water in the drain pan or delay finding the leak source.

Repair cost depends entirely on the source of the leak. Replacing a T&P relief valve typically runs between $100 and $250 including parts and labor. Tightening or replacing fittings and flex connectors may cost $75 to $200. If the tank body itself is leaking due to corrosion, the entire water heater will need replacement, which can range from $800 to $2,000 or more depending on unit size, fuel type, and installation complexity.

Start by inspecting the T&P relief valve and its discharge pipe for any dripping or signs of mineral buildup. Then check all water supply and distribution fittings at the top and sides of the tank for active leaks. If no leak is immediately visible, pressurize the system and perform a thorough leak test of the tank and all connections. Once the leak source is found and repaired, allow the drain pan sensor to dry completely before expecting the fault to clear.

Resetting the unit will not permanently clear the 6-flash code if the underlying leak has not been corrected. The accessory leak detection module will re-trigger the fault as long as the moisture sensor contacts remain wet. The pan must dry out and the leak must be fully repaired before the code will stay cleared after a reset.