Miele Washer Dryer WT 2670 Dryer burning smell

[Spindizzy]

Our WT 2670 is out of warranty and there is a burning smell when you run a drying cycle, the clothes are hot but wet. When this happened before it was a blocked duct over the top of the machine. It has been replaced twice by Miele in the past under their warranty. Is this a job I could under take and can you get the parts required?  Looking for a cheapish solution as the machine is 12 years old and the bearings are getting noisy. If not what make of replacement machine should we be looking at? Samsung are offering a 5 year free guarantee, are they any good?