Volvo V 70 - Short-circuit of electric auxiliary heater | HELLA

In the above vehicles, a clogged condensation water drain hose may cause a short circuit in the electric auxiliary heater.

The function of the electric (PTC) auxiliary heater located in the heater box may be significantly affected by a clogged condensation water drain.

Because the condensation water is not discharged to the outside, there is a risk of an electrical short circuit. In an extreme case, a cable may catch fire.

The vehicle manufacturer has already addressed the problem and checked the vehicles in the wake of a recall campaign, replacing the drain hose/valve where necessary.