Using this Fisher & Paykel Campini thermal cutout is easy. First, make sure your oven is turned off. Locate the area where the old thermostat was installed in your Fisher & Paykel built - in oven. Then, carefully connect the two 6.4mm spade terminals to the appropriate spots. When the oven starts to heat up, the cutout will stay open at room temperature. Once it reaches 55 degrees Celsius, it will close as expected. As for maintenance, check the terminals regularly for any signs of corrosion. If you notice any issues with the cutout not working as it should, or if there's visible damage to the ceramic body, it's a good idea to replace it. Also, always ensure that the oven is disconnected from the power source before performing any checks or maintenance.