this appliance is 3 years old, refrigerant gas is R600a. This is a ‘frost free’ unit but some months ago I noticed ice build up under the bottom draw, which I removed at the time but still get a build up. I don’t think the air fan is running at all. then a couple of days ago the temperature in the freezer was about 2-3C and the compresser had stopped running ( heat exchanger on back was cold).The lights were on in the cabinet and supercool switch light came on when pressed – but no physical response.Overnight compresser restarted, temperature in freezer is now around -28C and compresser is running continually.
Is this all to do with the air fan only? or is there something deeper?