No the vent is clear no ice.
OK Daniel, I will try that although I think it will take more than 24 hours to defrost. The temperature here is below freezing and the appliance is sited outside in a garage.. I'll get back to you in a day or two to let you know how I have got on.
Have tried your suggestion, switched it back on yesterday. Have put in a small item to see if it freezes so I will know tomorrow. It still doesn't seem very cold.
Could it be that the ambient temperature is too cold and the thermostat is recognising the low temperature and just not switching on? It is sited outside in a garage after all and the problem has only happened since winter has arrived.
Thanks Daniel for your speedy reply. I'll try your suggestion in the morning. It's 8pm here in the UK. I won't be able to get it in the house as I'm somewhat disabled but I'll have a go and examine the fan if it still not working.
If it isn't working I'll just scrap it rather than replace the fan. I would have to call someone out to do that and probably not worth the expense. It is a spare.
Just to let you know, the freezer is now working again. I haven't done anything to it so you were almost certainly correct in your diagnosis of a frozen fan.
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