Error code reference

Bradford White Water Heater Error Code 8-4 flash

Gas valve fault detected - control may need reset or is wet/physically damaged.

SourceBradford White PDV Series - Service Manual: Power Direct Vent Gas Water Heatersp. 15

Diagnostic procedure

The full 8-4 flash 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
Interrupt power supply to reset; if fault persists, replace gas control (page 26).

SourceBradford White PDV Series - Service Manual: Power Direct Vent Gas Water Heatersp. 15

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

6 manuals in the MyPros+ library document this code for Bradford White water heater.

Models covered by the manuals that document this code

More models are covered than are listed here.

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