Dyson® has just recalled some of their AM04 and AM05 Bladeless Heaters due to a possible short-circuiting and overheating risk.
If you have one of these, check to see if it is on the recall list at:
Follow instructions to register your affected heater. You will be returning it to Dyson for repair, plus servicing – at no charge to you. They will then send it back to you at no charge with a new 2 year warranty.