Using this dryer fan blade is straightforward. First, make sure your washer dryer is unplugged for safety. Then, locate the heater casing air duct assembly where the old fan blade is. Remove the old one and install this new 150mm diameter fan blade with the 6.5mm D - shape shaft fitting in its place. When installing, ensure it fits snugly. As for maintenance, regularly check the fan blade for any signs of damage like cracks or chips. If you notice any issues, replace it promptly. If your model isn't on the list, don't just assume it will fit. Always reach out to us with your brand, model number, and PNC number before making a purchase. And remember, this fan blade comes with a full guarantee, so you can rely on its quality.