Saunier Duval
Zoning / Multi-Zone Control Misconfiguration
Thermostat cannot control individual room zones or underfloor heating manifolds as expected
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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
Thermostat configured as single-zone only, Saunier Duval zone modules not installed or not paired, Incorrect wiring to zone valves or actuators, Incompatible third-party zone controls
How to Fix / Troubleshooting
Safety: Turn off power to the boiler and any zone control modules before working on wiring.
- Check system design: Confirm whether your Saunier Duval smart thermostat model supports multi-zone control or requires additional zone modules.
- Verify wiring: Ensure each zone valve or actuator is wired to the correct zone output on the Saunier Duval zone controller.
- Pair modules: In the app or thermostat menu, add and configure each zone module, assigning it to the correct room.
Complex multi-zone systems should be commissioned by a qualified heating engineer familiar with Saunier Duval controls.
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Repair Difficulty
Hard
4/5
Required Part
Saunier Duval Zone Control Module / Actuators
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