I had my aircon re-gassed in August last year, and it worked fine afterwards during the rest of the summer.
I tried to use it the other day, but it wouldn't come on. It almost certainly just needs re-gassing again. I didn't switch it on at all during the winter, which I'm led to believe doesn't help the gas's longevity.
How long is a reasonable time for the gas to last? Mine has lasted only 7 months: is this normal?
If there is a leak somewhere, can the aircon servicing companies usually trace the leak with thir UV lamp after 6 months, or will all the tracer colouring have vanished by now?