From the Auto Forum:
The question:
I have a mystic. Last winter it was 20. I drove a car with an enclosed oven. A sharp thrust. He killed two mice. They pulled them out, the threshold stopped. As before, the oven stopped working. In the autumn, my thermostat was repaired by the master worked as before. Now winter has come and the stove does not work and the consumption from 8l.100 km became 12.
Per anyone has had something like this please tell me.

Answer to:
Most likely, the mice helped turn the fan on the oven, and you killed them.