Expansion vessel 7,5L- DIFF pour Unical - 02396R

Repairing an Unical Boiler: Regulation, Hydraulics, and Heating Continuity

Unical boilers rely on a coherent system of hydraulic circuit and electronic control. A malfunction may arise from a valve, hydraulic component, sensor, or regulation fault. In many cases, replacing a targeted component can restore the system while maintaining original performance.

Unical DIFF® spare parts cover key components: valves (including 3-way valves), actuators, heat exchangers, sensors, and electronic boards depending on configurations. Functional compatibility is essential: a difference in connectivity, calibration, or electronic version can lead to faults or unstable behavior.

Essential Components for Your Repair

Depending on the symptoms, the components often involved are:

• Hydraulics: valves and actuators, in case of heating/domestic hot water switch or circulation issues.

• Sensors: temperature probes and pressure switches for reliable measurement and stable regulation.

• Electronics: control boards and modules in case of displayed faults or inconsistent control.

How to Identify the Right Unical Part?

Locate the exact model reference and, if possible, the reference of the original part. Unical boilers can vary by series, which influences hydraulics and electronic compatibility.

Technical Tip: before ordering, check the type of boiler (wall-mounted/floor-standing), the function (combi/domestic hot water), and the series reference: these are the most reliable criteria to ensure compatibility.