Thanks Pete. The problem was intermittent, then stopped working altogether for a few days. However seems to be working OK now (without having done anything) - however I fully expect it to stop working again. If/when it does I'll try switching it off for a few hours.
What does one do if it is loss of refrigerant gas, or blocked drier or capillary tube? As the appliance hasn't been damaged in any way I would suspect a blockage or some sort which comes and goes...
David, January 2007