and once every 6 mnths cleaned the large silver tray filter underneath.
Not enough, once a month at least for the condensor, every single load for the door filter.
Does the 'Empty Water' light come on?
The back of the chamber that holds the condensor ( large silver tray filter) has a channel along the back that often gets clogged, you need to reach right into the back to clean this out.
Occasionally the small polystyrene float in the pump housing at the back can shrivel up to a tiny biscuit which will also give this fault.
That which can be asserted without evidence, can be dismissed without evidence.