Using your Chef oven cooling fan motor is straightforward. First, make sure your oven is unplugged or the gas supply is turned off. Locate the old fan motor in your oven and carefully remove it, taking note of how the wires are connected. Then, connect the new motor using the 3 X 6.4mm spade terminals, ensuring proper earthing. Plug in the oven or turn on the gas supply. As for maintenance, it's a good idea to check the motor periodically for any signs of dust or debris. You can use a soft brush to gently clean it. If you notice any unusual noises or the motor isn't working as well as it should, turn off the oven and have it checked by a professional. Always follow the safety instructions in your oven's user manual when handling the motor.