Well the small fan got replaced, but I was still getting air con problems. It would blow hot one day then cold the next, also the pressure thing was worrying me. Anyway I dropped it off this morning to get looked at, and I picked it up at 5pm. The guy said that sods law the air con was working fine and the pressure was in the normal range whilst they had it. However after speaking to the senior tech he said that a common fault is that the pressure sensor can become faulty, so one is on order and I’m just waiting for the part to be delivered.