Bradford White Water Heater Error Code 1 short flash once per second

This flash pattern indicates that a weak pilot signal was detected during the last call for heat. The gas valve control module monitors the output from the thermocouple or thermopile and records this fault when the signal falls below the required threshold. It does not necessarily mean the pilot failed to light, only that the flame was not strong enough to produce an adequate sensor reading. Common causes include a blocked pilot tube, a dirty or oxidized sensor tip, or a wiring issue between the pilot assembly and the gas valve.

The code itself represents a detected performance issue rather than an active safety emergency. The control system recorded a weak pilot signal and will continue to attempt normal operation. However, an unreliable pilot signal can lead to ignition failures and unburned gas conditions, so the underlying cause should be addressed promptly rather than ignored. If you smell gas at any point, leave the area, avoid operating switches or electronics, and contact your gas utility.

Repair costs vary depending on the cause. If the fix is a simple cleaning of the pilot tube or tightening a loose connection, the expense may be limited to a service call fee, typically in the range of $75 to $150. If a thermocouple, thermopile, or wiring harness needs replacement, parts and labor combined generally fall in the range of $100 to $300. More involved repairs involving the gas valve assembly can push costs higher.

Some causes of this code are accessible to a knowledgeable DIYer. Inspecting and clearing a blocked pilot tube, checking wire connections at the gas valve, and cleaning visible oxidation from the thermocouple tip are tasks that do not require specialized tools. However, working on gas appliance components carries risk, and if you are not comfortable with the process or the fault returns after basic checks, a licensed technician should complete the diagnosis and any parts replacement.

Resetting the unit may temporarily clear the displayed fault, but it will not correct the underlying condition that caused the weak pilot signal. If the root cause such as a blocked pilot tube, oxidized electrode, or damaged wiring is not resolved, the fault is likely to return during the next call for heat. Always address the physical cause before relying on a reset to restore normal operation.