Bradford White Water Heater Error Code 1 flash/sec

A 1 flash per second code on a Bradford White water heater means the control detected a weak pilot signal during the last call for heat. The system uses flame rectification to confirm a stable pilot flame, and this fault is logged when the signal falls below the required threshold. It is a safety indicator, not a normal operating status. Common causes include a dirty pilot electrode, a restricted pilot tube, or damaged wiring to the pilot assembly.

Yes, this fault code exists specifically as a safety measure. The control system will not allow the main burner to operate if it cannot confirm a strong, stable pilot signal, which prevents unburned gas from being released. While the heater may not be actively dangerous when displaying this code, it should not be bypassed or ignored. Address the underlying cause before returning the unit to normal operation.

Resetting the control may temporarily clear the fault and allow the heater to attempt ignition again, but if the underlying problem is not corrected, the fault will return on the next call for heat. The 1 flash per second code reflects a condition that was detected during an actual heating cycle, so simply resetting without diagnosing and fixing the root cause is not a lasting solution. Always inspect the pilot assembly, pilot tube, electrode, and wiring before relying on a reset.

Some causes of this fault are DIY-friendly, such as cleaning oxidation off the pilot electrode or checking for visible debris near the pilot tube. However, working around gas components carries safety risks, and if the issue involves wiring, gas valve components, or a failed pilot assembly, a licensed technician should handle the repair. If you are not comfortable working near gas lines or open flames, contact a professional.

Repair costs vary depending on the cause. If cleaning the pilot electrode resolves the issue, you may spend very little beyond a service call fee, typically in the range of $75 to $150. If a pilot assembly replacement is needed, parts and labor combined generally fall in the range of $150 to $350. Costs can be higher if the gas valve control itself is found to be the underlying problem.