Error code reference

Bradford White Water Heater Error Code 4 flashes (V1)

Excessive tank temperature; system must be reset. Temperature sensor out of calibration or faulty gas control.

SourceBradford White Ultra Low NOx Water Heaters - Service Manual: ECO Defender Seriesp. 7

Bradford White codes Bradford White water heater codes

Diagnostic procedure

The full 4 flashes (V1) procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Replace gas control.

SourceBradford White Ultra Low NOx Water Heaters - Service Manual: ECO Defender Seriesp. 7

Unlock with pass

More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

1 manual in the MyPros+ library documents this code for Bradford White water heater.

Models covered by the manuals that document this code

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The full 4 flashes (V1) procedure

Where this code is documented

Models covered by the manuals that document this code

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