Skip to main content
Error code reference
Bradford White Water Heater Error Code 34
Combustion air temperature sensor is faulty.
SourceBradford White EverHot Exterior Tankless Gas Water Heater - Service Manual (IGE-199 Series)p. 24
Diagnostic procedure
The full 34 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 sensor wiring for damage. Check resistance on sensor. Check and clean dirt from sensor. Ensure fan blade is tight on motor shaft and is in good condition. Clean blower blades if dirty. Check for restrictions in air flow around unit and vent terminal. Replace sensor.
SourceBradford White EverHot Exterior Tankless Gas Water Heater - Service Manual (IGE-199 Series)p. 24
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock 34 procedure $9.95
Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.
Where this code is documented
2 manuals in the MyPros+ library document this code for Bradford White water heater.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax