E15
Delta Dore Firmware Update Error

E15 appears and the thermostat reports a firmware update failure; some functions may be disabled.

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

Interrupted update due to power loss, Poor Wi‑Fi or RF connection during update, Incompatible firmware file, Internal flash memory fault

How to Fix / Troubleshooting

Safety first: Do not disconnect power during any subsequent firmware update attempts unless instructed by the manufacturer.

  • Stable power and network: Ensure the thermostat and Tydom gateway have stable power and a reliable internet connection.
  • Retry update: Use the Tydom app or thermostat menu to retry the firmware update. Follow on-screen instructions and wait until completion.
  • Factory reset (if allowed): If the device offers a recovery or factory reset mode for firmware issues, follow the Delta Dore instructions to restore a stable firmware version.

If E15 remains and the thermostat is partially functional or bricked, contact a professional or Delta Dore support; the unit may need to be replaced.

Advertisements

Repair Difficulty

Medium 3/5

Required Part

Delta Dore Thermostat Firmware / Main PCB
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements