Ideal boiler displays H6, hot water temperature may be erratic
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off the boiler and isolate the cold water supply before any work on water connections. Internal work must be done by a competent engineer.
User checks:
- Check water flow: Ensure good flow at hot taps. If flow is very low, check that isolation valves under the boiler are fully open.
- Clean tap aerators: Remove and clean any blocked tap filters that may be restricting flow.
Engineer tasks: Remove and clean the DHW inlet filter, inspect and replace the DHW flow turbine/flow sensor assembly if sticking or damaged, and check wiring back to the PCB.
Repair Difficulty
Required Part
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