E24
Remeha
Flue gas recirculation / CO₂ out of range
Furnace shows E24, no burner operation, fan may run
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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
Incorrect flue terminal positioning, Damaged or separated concentric flue, Blocked air intake, Incorrect gas/air adjustment
How to Fix / Troubleshooting
Safety first: Risk of flue gas spillage and CO poisoning. Do not operate the furnace until the flue system is checked.
- Inspect flue terminal: Ensure the terminal is installed according to Remeha clearances from windows, doors, and corners. Remove any nearby obstructions.
- Check concentric flue integrity: From accessible points, verify that the inner and outer flue pipes are correctly joined and sealed.
- Air intake: Confirm that the air intake path is not blocked by insulation, stored items, or building modifications.
- Combustion analysis: A technician must perform a flue gas analysis and adjust the gas/air ratio if necessary.
- Flue repair: If the flue is damaged or incorrectly installed, it must be repaired or replaced by a qualified installer.
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Repair Difficulty
Professional Required
5/5
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