JAZZMANB
Striker
Just playing devils advocate ,have you confirmed it should have one ?Got an engineer to try and fix it after it stopped working. Engineer said "where's the filter for the heat exchanger?"
There wasn't one. Never supplied, not mentioned in the manual. Not noticed by the previous repair bloke under warranty.
No mention in the manual suggests not .It's took a while for the missing bit to have an affect .
If you get the manufacturer to confirm it should have ,I'd go dIrect to them
There must have been a batch ,not just yours