Volvo XC 70 - Condensed water drain hose | HELLA

On the above mentioned vehicles a blocked condensed water drain hose can cause a short circuit in the electrical booster heater.

The function of the electrical (PTC) booster heater in the heater unit can be significantly degraded by a blocked condensed water drain.

Due to the fact that the condensed water is not drained to the exterior, there is a risk of an electrical short circuit. In an extreme case there is a risk of a cable fire.

The problem has already been addressed by the vehicle manufacturer, the vehicles checked during a recall campaign and the drain hose/drain valve renewed.

It must be assumed, that for a variety of reasons not all vehicles have been checked and/or repaired.