Using this main control module for your Westinghouse WSE6870SA fridge is a breeze. First, unplug the fridge from the power source to ensure safety. Then, carefully remove the old module and install the new one in its place. It's designed to fit easily, so you won't need any special tools or skills. When it comes to maintenance, keep the fridge clean and make sure the area around the module is free from dust and debris. If you notice any issues with the fridge's operation, don't rush to replace the module right away. Check other parts like the defrost element and compressor first, as problems with them might be causing the issue. Remember, damage caused by external factors isn't covered by the warranty, so handle the fridge and the module with care.