Bosch Wind-Induced Flue or Air Pressure Issues

Furnace locks out intermittently during windy conditions

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

Improper flue terminal location, Flue termination too close to corners or obstacles, Weak air pressure switch margin, Inadequate combustion air supply

How to Fix / Troubleshooting

Safety: Do not modify flue terminations without following Bosch and local code requirements.

Inspect terminal: Ensure the concentric flue terminal is installed per Bosch clearances from corners, windows, and other structures.
Wind baffles: In some cases, approved wind shields or terminal kits are available from Bosch to improve performance in exposed locations.

Flue design changes should be evaluated and implemented by a qualified installer.

Repair Difficulty

Hard 4/5

Required Part

Concentric Flue Terminal

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