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Error code reference
Bradford White Water Heater Error Code 4 flashes red (V2)
Temperature cut-out limit reached.
SourceBradford White Ultra Low NOx Water Heaters - Service Manual: ECO Defender Seriesp. 8
Diagnostic procedure
The full 4 flashes red (V2) 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
1
First diagnostic step
Check the valves and water temperature sensor. Reduce water temperature setpoint. Thoroughly check main valve operation and water temperature control before leaving. Replace gas control.
SourceBradford White Ultra Low NOx Water Heaters - Service Manual: ECO Defender Seriesp. 8
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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