If the tailpipe is blocked or sufficient ventilation is not possible, poisonous exhaust gases such as carbon monoxide may enter the vehicle. This is the case in enclosed spaces or if the vehicle gets stuck in snow, for example.
Flammable materials such as leaves, grass or twigs may ignite.
If the flow of hot air is blocked, the auxiliary heating may overheat and switch off.
Operating the stationary heater or stationary ventilation drains the battery.
initial operation
after a voltage supply interruption (e.g. if the battery has been disconnected)
after a malfunction