E13
Weishaupt
Flue Gas / Draft Fault
Display shows E13; unit may shut down during high demand or windy conditions.
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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.
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Possible Causes
Partially blocked flue, Incorrect flue length or configuration, Strong wind causing downdraft, Faulty flue gas sensor or pressure switch
How to Fix / Troubleshooting
Safety: Do not operate the heater if you suspect flue gas is not being safely discharged. Risk of carbon monoxide.
- Check terminal: Inspect the external Weishaupt flue terminal for obstructions (bird nests, leaves, snow). Clear any blockage.
- Verify flue installation: Ensure that flue sections are properly joined, supported, and sloped as per Weishaupt installation instructions. Incorrect installation can cause E13 faults.
- Wind effects: If E13 occurs only during strong winds, consider fitting an approved terminal guard or wind shield after consulting Weishaupt documentation.
- Sensor/switch check: A technician should test the flue gas sensor or any flue pressure switch for correct operation and replace if necessary.
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Repair Difficulty
Hard
4/5
Required Part
Flue System / Flue Gas Sensor
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