Domestic hot water is not hot enough, even when the boiler is set to a high temperature.

Safety first: Avoid setting temperatures excessively high to compensate, as this can increase scald risk.

• Verify set temperature: Check the boiler's DHW temperature setting on the control panel and adjust to the desired level within safe limits.
• Check flow rate: Excessive flow through taps or showers can reduce outlet temperature. Reduce flow slightly and observe changes.
• Inspect gas supply: If other gas appliances are weak, contact your gas supplier to check pressure.
• Descale DHW exchanger: Have a technician descale or replace the plate heat exchanger if limescale is suspected.