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Error code reference
Bradford White Water Heater Error Code 26
Vent safety switch located near the exhaust pressure switch has opened, gas valve closes, blower post-purges, lockout condition.
SourceBradford White eF Series Water Heater - Service Manual: Troubleshooting & Repairp. 15, 33
Diagnostic procedure
The full 26 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 if collector compartment is overheating (350°F); reset vent safety switch if safe. Refer to Vent Safety Switch Testing and Replacement.
SourceBradford White eF Series Water Heater - Service Manual: Troubleshooting & Repairp. 15, 33
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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