Funny you should mention this. These exact units came with the house we just moved into, both not more than 2.5 years old. The front of the condenser was caked with lint that we couldn't vacuum off or remove using a toothbrush, and it had a poor fitting filter that was allowing lint to get to the condenser. Then I started watching YouTube videos on what it takes to disassemble and clean these units and how what you see at the front of the condenser is literally the tip of the iceberg in terms of how much lint build-up happens inside. Then the washing machine threw an error code at us and we decided to chuck them and buy something new.
We're stuck having to use a heat pump dryer based on the location of the laundry room and no outside venting, and while I'm a fan of the technology and the significant energy savings, it just can't be a good idea to pass lint-filled air through a series of condenser coils even after passing through a series of filters.
For anyone interested in how this works, here's a good video.