CF
Heatit
Configuration Memory Error
Display shows CF and thermostat cannot save settings
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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 wear-out, Corrupted configuration data, Power loss during write operation, Firmware bug affecting memory writes
How to Fix / Troubleshooting
Safety first: No live wiring work is required for configuration; if you open the unit, turn OFF power at the breaker.
Steps to troubleshoot:
- 1. Factory reset:
- Perform a full factory reset using the button sequence in the Heatit manual.
- Re-enter your settings and observe if CF reappears.
- 2. Avoid rapid changes:
- Do not repeatedly change settings in quick succession; allow the thermostat time to save.
- 3. Firmware update:
- For smart models, update firmware via your gateway if an update is available.
- 4. Replace thermostat:
- If CF persists, the internal memory is likely defective and the thermostat should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Heatit Thermostat (internal memory)
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