Ariston
Imbalanced or Air-Locked Heating System
Radiators or heating zones are partially warm; some remain cold even when furnace is running.
Advertisements
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.
Advertisements
Possible Causes
Air in radiators, Stuck zone valve, Sludge in system, Incorrect balancing
How to Fix / Troubleshooting
Safety: Allow radiators to cool slightly before bleeding to avoid burns.
- Bleed radiators: Use a radiator key to release air from cold radiators until water flows steadily.
- Check zone valves: For multi-zone systems, ensure each motorized valve is opening when its thermostat calls for heat.
- Balance system: Partially close lockshield valves on radiators that heat quickly to encourage flow to colder ones.
- System flush: If radiators remain cold at the bottom, sludge may be present and a professional power flush may be needed.
Advertisements
Repair Difficulty
Medium
3/5
Advertisements