Was able to book a call quickly, was able to come out a bit a earlier and called to arrange. Unfortunately, though he tinkered to the best of his ability, he had to pronounce our air conditioner as beyond all help. It is an older system and has had a good life and got us through the hottest day ever recently. It was only to be expected at some stage. Gave us some good advice on choosing a new system. Would recommend to others.