Bradford White Water Heater Error Code 5 flashes (red)

A 5-flash red LED sequence on a Bradford White water heater indicates a Gas Control V2 fault. This means the gas control unit has detected a problem in its internal electronics, the water temperature sensor circuit, or the gas valve mechanism. The heater will not operate until the fault is diagnosed and resolved. Start by inspecting the water temperature sensor and its wiring connections.

No. When the 5-flash fault is active, the gas control has shut the heater down as a protective measure. You should not attempt to bypass this lockout or force the heater to operate. The fault could indicate a condition that, if ignored, poses a fire or gas leak risk. Leave the heater in its shut-down state until the fault is properly diagnosed and repaired.

Repair costs vary depending on which component has failed. If the fix is a wiring repair or connector cleaning, costs may be minimal, primarily covering a service call fee ranging from around $75 to $150. A replacement temperature sensor is relatively inexpensive, typically in the $20 to $60 range for the part. A full gas control valve replacement is more significant, with parts generally ranging from $150 to $350 and labor adding another $100 to $200 depending on your region and the technician.

A knowledgeable DIYer can perform the initial diagnostics, which include inspecting the temperature sensor wiring harness, checking for corrosion or loose connections at the sensor connector, and testing the sensor's resistive elements for opens, shorts, or imbalance between the two elements. However, if the gas control unit itself has failed, replacing it involves working with gas supply lines, which is a task best handled by a licensed plumber or gas technician. Gas valve work that is done incorrectly creates serious safety hazards.

A reset may temporarily clear the fault display, but if the underlying problem with the temperature sensor, wiring, or gas control electronics has not been corrected, the error will return. Repeated resets without addressing the root cause will not restore reliable operation and could mask a developing safety issue. Diagnosis and repair of the actual fault should be completed before returning the unit to service.