Immergas Overheating DHW Outlet

Hot water temperature is scalding even at moderate control settings.

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

Faulty DHW NTC sensor reading too low, Stuck gas valve at high fire, Faulty modulation control, Incorrect parameter settings

Safety: Risk of scalding. Reduce temperature setting immediately and warn occupants.

Lower DHW setpoint: Reduce the temperature on the Immergas control panel and verify outlet temperature with a thermometer.
Check DHW NTC sensor: Ensure it is correctly mounted and not loose or detached from the pipe.
Call technician: Overheating may indicate a serious control or gas valve fault; have a professional test and repair.

Warning: Until fixed, consider turning off the heater or mixing with cold water to avoid burns.

Hard 4/5

DHW NTC Sensor

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