De Dietrich
Short Cycling / Control Misconfiguration
Boiler cycles on and off rapidly, room temperature unstable
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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
Oversized boiler, incorrect parameter settings, poor system volume, faulty room thermostat placement
How to Fix / Troubleshooting
Safety: Parameter changes should follow the De Dietrich installation manual.
- Check thermostat location: Ensure the room thermostat is not near heat sources, direct sunlight, or draughts.
- Increase system volume: If many radiators have been removed or valves closed, reopen some circuits or consider adding a buffer vessel.
- Adjust settings: Using the installer menu (technician only), adjust minimum burner power, anti-cycling time, and weather compensation curve to reduce cycling.
- Technician tasks: A heating engineer should review system design and adjust boiler parameters accordingly.
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Repair Difficulty
Medium
3/5
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