Hi All

I am posting as I have had a problem much like this one but am not sure if in fact I have more than one issue.

I found my 2012 Focus 5 door (UK) was fogging up and getting bad condensation. Eventually, I found the boot full of water and followed the investigation and process around the rear air vents. The passenger side compartment was soaking wet. The vents have now been sealed both sides though the driver's side seemed fine.

However, I've also found water in the rear and front footwell on the passenger side. It is worse towards the rear, so wet it showed through the carpets with a bit of a squeeze. But I just took the front seat out and it's wet all the way along to the front passenger footwell.

I'm wondering how likely it is this is just the same problem and the water has somehow run into these spaces or could it be another leak somewhere? I've seen posts about the aircon and other problems that might be relevant?

If it's a further problem, is it best to just get the dealer on the job or is it a reasonable DIY job?

Thanks in advance for all help.