Did you say the new pressure switch leaked?
Yes mate. But think we have made a cock up....when we took out the old switch there was no o ring, fitted the new one with o ring and that's when the codes came and climate shut down etc.
When I lifted the bonnet you could hear gas escaping. Fitted the old switch without o ring (as that's how it came off) but with hindsight we reckon the old o ring was still in so we put one on top of the other if you get what I mean, and it didn't seal properly!