I have got to replace the lead from the battery pack to the igniter as it is broken. I don´t know whether the mouse has chewed it through or whether it has disintegrated due to age (1990). I have contacted Truma to see if this part is available but unfortunately they are closed doe to COVID-19, so I have to wait until they open again before I can find out. However, this lead runs under the heater so I need to remove it to find out what it is connected to. I do not know how to remove the fire as there are a lot of bolts and screws, some of them can´t be got at, so it has obviously got to be done in some rotation and I don´w really want to remove any more than I have to. Can anyone help?