E09
Tado
Valve Calibration Error
Smart Radiator Thermostat shows E09 and cannot complete calibration; valve either always open or always closed.
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
Incorrect valve adapter height, Radiator valve not compatible with Tado, Valve pin travel outside expected range, Loose mounting of Tado head
How to Fix / Troubleshooting
Safety first: Let the radiator cool before handling the valve.
- Confirm valve type: Identify your radiator valve (e.g., M30x1.5, Danfoss RA/RAV/RAVL). Use the correct Tado adapter supplied in the kit or ordered separately.
- Adjust adapter: Ensure the adapter is screwed fully onto the valve body and is not cross-threaded. The Tado head should sit firmly without wobble.
- Check pin travel: With the Tado head removed, observe the valve pin travel by gently pressing it. If it barely moves or is extremely long, the valve may be incompatible or faulty.
- Re-run calibration: Refit the Tado head, insert fresh batteries, and start calibration from the app. Keep the room quiet to listen for motor movement and any grinding noises.
- If E09 persists on multiple heads: The underlying valve body may be incompatible or defective and may need replacement by a plumber.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Tado Radiator Valve Adapter
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements