Bradford White water heater shows signs of backdrafting: hot, moist air or exhaust smell at draft hood.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Critical safety: Backdrafting can cause carbon monoxide buildup. If you suspect backdrafting, turn off the heater and other gas appliances and ventilate the area. Install or check CO detectors.
Steps:
- Visual vent check: Inspect vent connector and chimney for disconnections, corrosion, or blockages.
- Draft test: With the burner running, hold a smoke source (incense) near the draft hood. Smoke should be drawn into the hood, not pushed out. If it spills out, stop using the heater.
Backdrafting issues must be corrected by a qualified technician or chimney professional who can evaluate vent sizing, chimney condition, and house pressure.