Hello, I’m out now as totally clueless ?? the following problem. I had to run the heater and was away for about half an hour. However, in the time unfortunately something fell before the air intake. When I came back I of course immediately removed it but the heater has already shut down at this moment. Since then I unfortunately can not get it on. Safety pull etc. Unfortunately did not bring anything. Cold air blows it still, on circumference it can also be adjusted. Someone an idea what else you could do? And if I would install a new one, you would have to change everything theoretically. But can you continue to use the old dosing pump or should it be changed? Thank you already ??