However, if you haven't given it much thought lately beyond appreciating the cool breeze it provides, it might be worth implementing a few useful tips to prolong the life of your HVAC system and keep it in good working order when it matters the most. One of the most common issues air conditioners face, especially in particularly humid environments, is a clogged drain line. It's recommended to flush your system's drain line every few months to keep things clear and free-flowing. If you neglect this maintenance task, you might notice uncomfortably high levels of humidity in your home, the development of rust on the unit, water pooling in the drain pan, frequent shutoffs, or issues with consistent cooling. If you're noticing any of these symptoms but your unit is in good working order otherwise, a basic flush is likely all you need.