The most common causes include limescale build-up, restricted water flow, low temperature settings or a fault with the heating system. If the problem has developed gradually, routine maintenance such as descaling is often the first thing to try.

Yes. Limescale reduces the efficiency of the heating system and can restrict water flow through the machine. Regular descaling helps maintain brewing temperature and overall performance.

If your coffee is warm rather than hot, check the machine's temperature settings, allow it to complete its warm-up cycle and consider whether descaling is due. A cold cup can also make coffee cool more quickly after brewing.

A gradual reduction in temperature is often linked to limescale or restricted water flow rather than a sudden component failure. Completing routine maintenance may restore normal brewing performance.

If limescale is affecting the heating system or water circuit, descaling can often improve brewing temperature by restoring efficient heat transfer and normal water flow.

If you've completed a full descale cycle, checked the temperature settings and the machine still produces cold coffee or fails to heat at all, there may be a fault with the thermoblock, boiler, temperature sensor or another internal component that requires professional diagnosis.