Bradford White Water Heater Error Code 1 short flash per second

This flash pattern indicates a weak pilot signal was detected during the last call for heat. The gas valve control monitors the millivolt output from the thermocouple or thermopile, and when that output is too low, it logs this fault. The most common causes are a restricted pilot tube, a contaminated electrode, or a degraded sensing element. The unit may shut down heating until the issue is resolved.

Yes, this fault is a safety-related indication. The control system shuts down or limits operation when the pilot signal is too weak because it cannot reliably confirm that the pilot flame is present. Continuing to attempt operation without resolving the root cause could result in unburned gas accumulation. Address the underlying pilot assembly issue before returning the unit to normal service.

If the repair only requires cleaning the pilot tube and electrode, costs are minimal and may involve only a service call fee, typically in the range of $75 to $150 depending on your area. If a thermocouple or thermopile replacement is needed, parts generally cost between $15 and $60, with total repair costs including labor ranging from $100 to $250. More extensive repairs involving the gas valve or wiring harness will fall at the higher end of that range.

Start by inspecting the pilot assembly following Service Procedure II: check for an unstable or undersized pilot flame, inspect the pilot tube for blockages or restrictions, clean any oxidation from the pilot electrode, and examine all wiring for damage or loose connections. If cleaning and inspection do not resolve the fault, the thermocouple or thermopile may need to be replaced. Always shut off gas supply before performing any internal inspection.

Resetting the unit may temporarily clear the displayed fault, but the code will return on the next call for heat if the underlying cause has not been corrected. The control logs this fault because the pilot signal fell below acceptable levels during actual operation, so any reset without a repair is likely to be temporary. Inspect and service the pilot assembly before relying on the unit for normal hot water production.