Managed to swap it out there today. Finicky piece of awkwardness.......for me anyway!
The replacement unit is Siemens don't know what the original one was but there were some differences all on the back of the units like screwed mount positions for the electrics and the splined cable for the air direction which kind of threw me a little as I thought the replacement wouldn't fit or work. Few pictures of taking apart and jiggery-pokery.