Bradford White Water Heater Error Code 5 flash

The 5-flash error code on a Bradford White water heater indicates that the control board has detected a flame signal at the pilot when no flame should be present. Specifically, this fault points to a pilot valve that is stuck in the open position, allowing gas to flow through the pilot circuit even when the control system has not commanded it. The gas control valve contains a pilot solenoid that is supposed to shut off gas flow to the pilot burner under certain conditions. When the flame sensor detects ionization current during a period when the pilot should be off, the control interprets this as an undesired or false flame condition and enters a lockout state, signaled by 5 LED flashes.

This fault differs from a pilot outage or ignition failure. Instead, it represents a valve integrity issue. The pilot valve inside the gas control assembly may fail mechanically, preventing it from fully closing. This can happen due to debris in the valve seat, corrosion of internal components, or wear on the solenoid actuator. In some cases, a faulty flame sensing circuit could generate a spurious signal, but the primary and most common root cause is the gas control valve itself failing to close off pilot gas flow on command.

Because this condition involves uncontrolled gas flow through a stuck valve, the prescribed first diagnostic step is direct replacement of the entire gas control assembly. The gas control is an integrated unit combining the thermostat, gas valve, pilot solenoid, and control electronics, so individual internal components are not typically serviceable in the field. Resetting the unit without replacing the gas control will not resolve the underlying mechanical fault.