Bradford White Water Heater Error Code 6 flashes

The 6-flash error code on a Bradford White water heater indicates that the optional accessory leak detection module has sensed an excessive accumulation of water in the drain pan or water dam beneath the unit. This module uses moisture-sensing contacts positioned at the base of the unit to detect standing water. When those contacts are bridged by water, the module triggers the fault sequence and the status LED begins flashing 6 times in a repeating pattern. The heater may shut down or restrict operation to prevent further damage or a hazardous condition.

The source of the water can originate from several points in the system. The temperature and pressure relief valve, commonly called the T&P valve, is one of the most frequent culprits. This valve opens automatically when tank pressure or temperature exceeds safe limits, discharging water through the relief line. A weeping or fully open T&P valve will deposit water into the drain pan over time. Supply and distribution fittings, flex connectors, and threaded joints at the top and sides of the tank are also common leak points, especially in installations that have experienced thermal cycling or water hammer stress.

Diagnostic procedure should begin with a visual inspection of the T&P valve and its discharge pipe, followed by a close examination of all water connections at the tank inlet, outlet, and any recirculation ports. If no active leak is immediately visible, pressurizing the system and performing a systematic leak test of the tank body and all fittings is necessary to locate the source. The accessory module will continue to display this fault until the moisture sensor dries out and the underlying leak is corrected.