Vokera
Insufficient DHW Output Temperature
Water heater’s burner runs but hot water temperature is too low even at maximum setting
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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
Partially blocked DHW heat exchanger, Low gas pressure, Incorrect burner setting, Faulty DHW NTC sensor
How to Fix / Troubleshooting
Safety first: Do not attempt to adjust internal gas settings yourself.
User checks:
- Ensure the DHW temperature control on the front panel is set to a higher setting.
- Reduce the flow rate at the tap or shower; very high flow can reduce outlet temperature.
- Check that the cold supply is not being mixed excessively at the outlet mixer.
Engineer actions:
- Check gas rate and burner pressure and adjust if necessary.
- Inspect and descale the DHW plate heat exchanger.
- Test the DHW NTC sensor and replace if readings are inaccurate.
If the appliance is undersized for the property’s demand, an engineer can advise on options.
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Repair Difficulty
Medium
3/5
Required Part
DHW Plate Heat Exchanger
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