Riello
No Cylinder Heating
Boiler provides heating but not hot water to cylinder on system/regular boilers
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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
Faulty motorised zone valve to cylinder coil, Cylinder thermostat failure, Wiring centre fault, Air lock in cylinder coil
How to Fix / Troubleshooting
Safety: Isolate power before working on motorised valves or wiring.
- Check cylinder stat: Turn the cylinder thermostat up and listen for a click. If no click, it may be faulty.
- Motorised valve lever: Locate the valve serving the cylinder coil. Move the manual lever to the open position and see if the cylinder heats. If it heats manually, the motor or controls are at fault.
- Bleed air: Bleed any air vents near the cylinder coil to remove air locks.
- Professional replacement: A heating engineer can replace the faulty motorised valve head or cylinder thermostat and check wiring.
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Repair Difficulty
Medium
3/5
Required Part
Motorised Zone Valve
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