Bosch EasyControl
Short Cycling of Boiler Due to Control Settings
Bosch EasyControl causes the boiler to cycle on and off frequently (short cycling), even with small temperature changes.
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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
Too narrow temperature hysteresis, Boiler minimum output too high, Oversized boiler for system, Incorrect EasyControl modulation settings
How to Fix / Troubleshooting
Safety first: Isolate power before changing boiler internal settings if covers must be removed.
- 1. Adjust hysteresis: In installer settings, increase the temperature differential (if configurable) to reduce rapid on/off cycling.
- 2. Lower flow temperature: Reduce maximum flow temperature to allow longer, gentler burn periods.
- 3. Enable weather compensation: Use outdoor sensor and weather compensation to smooth boiler operation.
- 4. Balance system: Ensure all radiators are open and balanced so that the boiler has sufficient load.
Professional help: Persistent short cycling may require a heating engineer to adjust boiler parameters or consider system modifications (e.g., buffer tank).
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Repair Difficulty
Medium
3/5
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