Immergas
Intermittent DHW Temperature Regulation
Water temperature fluctuates between hot and cold during a shower without any error code.
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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
Scaled DHW plate heat exchanger, Partially blocked cold inlet filter, Faulty DHW NTC sensor, Unstable gas supply pressure
How to Fix / Troubleshooting
Safety: Allow the unit to cool and isolate power and water before disassembly.
- Clean inlet filters: Ensure both cold water and heating return filters are clean to maintain stable flow.
- Descale DHW plate heat exchanger: Remove and flush with descaling solution to restore heat transfer and flow balance.
- Check DHW NTC sensor: Ensure it is firmly attached and wiring is intact.
- Avoid very low flow: Some models regulate poorly at extremely low flow rates; slightly increase tap opening.
Recommendation: If fluctuations persist, have a technician check gas pressure and combustion settings.
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Repair Difficulty
Medium
3/5
Required Part
DHW Plate Heat Exchanger
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