Bradford White Water Heater Pilot Won’t Stay Lit — What’s Happening
When the pilot won’t stay lit on a Bradford White gas water heater, the control is either not sensing a stable pilot flame or the flame is being physically lost after ignition. This is not an error code but a service symptom Bradford White uses to indicate a failure in the pilot assembly, ignition proving path, or gas control.
On Bradford White Defender systems, repeated pilot failure points to a problem in the pilot assembly or the safety shutoff inside the gas control rather than just a bad thermocouple like on older models. The issue requires systematic replacement starting with the pilot assembly.
Most Likely Causes
- Failed pilot assembly Bradford White explicitly directs replacing the pilot assembly first when the pilot will not stay lit.
- Oxidized or dirty igniter electrode The igniter electrode can develop oxidation that prevents proper spark, and Bradford White instructs cleaning it carefully with very fine emery cloth.
- Blocked pilot tubing or pilot orifice Debris or corrosion can block the pilot tube or orifice, and the manual instructs removing, inspecting, and cleaning or replacing both.
- Igniter wire failure A break in the white igniter wire prevents spark, and Bradford White directs checking continuity with a multimeter on ohms and replacing the pilot if there is no continuity.
- Gas control failure If replacing the pilot assembly does not solve the problem, Bradford White says to replace the gas control.
- Combustion air or venting problems Inadequate combustion air, negative pressure, or flue spillage can repeatedly extinguish the pilot even after successful ignition.
How to Diagnose and Fix
- Verify the symptom by relighting the pilot using the unit’s lighting instructions and holding the control in pilot position as directed.
- Check for spark at the igniter electrode during the lighting sequence.
- If there is no spark, remove the white igniter wire from the gas control and test spark to ground using a multimeter for continuity on the ohms setting.
- If there is no continuity in the igniter wire, replace the pilot assembly per Bradford White procedure.
- If spark is present, inspect the igniter electrode for oxidation and clean it with very fine emery cloth if needed.
- Remove and inspect the pilot tube and pilot orifice for blockage, then clean or replace as necessary.
- Reassemble all components, restore gas supply, and check all connections for leaks before relighting.
- If the pilot still will not stay lit after pilot assembly service, replace the gas control following Bradford White’s replacement procedure.
Parts You Might Need
| Part | Notes |
|---|---|
| Pilot assembly | Amazon | Bradford White’s first recommended replacement for pilot won’t stay lit |
| Gas control valve | Amazon | Replaced if problem persists after new pilot assembly |
| Pilot tube and orifice | Amazon | Cleaned or replaced if blocked |
When to Call a Pro
Call a qualified gas technician for all pilot assembly and gas control replacement work. Bradford White’s service procedures require shutting off gas, disconnecting gas lines, checking for leaks with approved solutions, and following specific reassembly sequences. If you notice intermittent pilot outages, repeated failures after relighting, or signs of improper venting like soot or exhaust spillage, a technician should also evaluate combustion air supply and flue performance to prevent dangerous conditions. For gas line, burner, or igniter work, or if you ever smell gas, stop and call a licensed technician.