The device can fire if the correct water (at low temperature) inside the car wash is frozen and the automatic proofreader stops working (inside the sensor). As soon as the ice is off, the signal light goes out. In the event of a malfunction, the device shall be signaling (food and light bulb) even in the case of headlamps switched off. It is possible that the correct mechanism of the proofreader is not correct in the headlamp, and it is necessary to check its operation. If the problems with the proofreader are correct, then the headlamps should be changed.