E19
Immergas
Configuration Write Error
Thermostat shows E19 and cannot save new configuration parameters
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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
EEPROM write failure, Insufficient internal memory, Interrupted write due to power loss, Firmware corruption
How to Fix / Troubleshooting
Safety: Avoid cutting power while configuration changes are being saved.
- Step 1 – Retry changes: Make one configuration change at a time and confirm saving. Avoid rapid multiple changes.
- Step 2 – Power cycle: Turn off power for 1–2 minutes, then restore and attempt configuration again.
- Step 3 – Factory reset: Perform a full reset to clear corrupted settings, then reconfigure.
- Step 4 – Firmware update: Update firmware via app or service tool.
- Step 5 – Replace thermostat: If E19 persists, the internal memory is failing and the thermostat must be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Immergas thermostat main PCB
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