Guess what has happened?
Yep, air con has failed. We have no heat. It is now almost ten years old. It failed twice in the winter of 2006 with a damp circuit board in the outside part of the unit. I wonder if it is the same problem. The second failure was repaired without cost to us.
R wanted to get rid of the fan heaters we bought to warm us in 2006. I insisted we keep them. He is glad we did now. The vertical one is ceramic, whatever that is. It takes a long time to heat up but is much cheaper to run.
They do actually warm the living area reasonably well, but I also remember the killer electric bill in 2006. What they don't do is warm the whole place. We are keeping the spare bedroom door closed, the bedroom nearest the living area, but it also where the clothes airer is, and so the washing is not drying well at all. I will need to use the clothes dryer.
I think it was about 2008 when the remote control failed and we had to buy a new one. Fortunately you can still use the air con without a remote. If you switch it on at the unit itself, it will go to either maximum heat or maximum cool. Switch it off and on again to change from one to other. But that is no help when you have error codes UA, U1 and U4.
Now R is not working, at least is not the hassle for one of us to be available for when a service person comes, but they can't come until next Thursday.