When the boiler is working hard to extract air, a dirty air filter can be sucked back into the system. This can prevent enough oxygen from passing through, leading to “flame expansion”. This is as dangerous as it sounds, as flames can “come out” of the oven cabinet in search of more oxygen. Operating the oven in this state can be hazardous, as it could set fire to nearby objects.
In some extreme cases, a dirty filter can even cause a fire. All limit switches will eventually malfunction over time, but their chances of failure increase if they are constantly activated by an inefficiently operating oven. The increased heat could lead to a fire or even an explosion. The filter can be absorbed by an overloaded oven, significantly increasing the chances of a fire or explosion.
Oven filters are designed to protect the oven and air conditioner from dust. If the filter is not changed regularly, dust can accumulate to the point where the filter collapses and is sucked into the oven cabinet, causing a fire. To ensure maximum efficiency, you should change your home filter once a month.