Using this universal water bottle cooler thermostat is straightforward. First, check if your water bottle cooler or chest freezer is of Asian origin as it's designed to fit these models. For installation, locate the existing thermostat in your appliance. The mounting holes on this thermostat are 55mm apart, so align them properly during installation. Connect the 6.4mm spade terminals as required. If you're using it to convert a chest freezer into a keg cooler, set the temperature to your desired range between 1 - 8 degrees Celsius. When it comes to maintenance, keep the thermostat clean from dust and debris. Avoid exposing it to excessive moisture. If you notice any issues with temperature control, check the connections first. If problems persist, it might be time to consider a replacement. And remember, with our 25 - year - long reputation in supplying appliance parts, you can trust the quality of this product.