Complete 1 system a/c repair and preventative maintenance check. Completed diagnostic found very dirty filter causing the system to freeze up due to low air flow. Changed filters. The system is cooling. Pressures are good. I do recommend signing up on maintenance plan to ensure filters get changed and systems get cleaned and drain lines cleared. Also to prevent any possible damage to the system by catching things prematurely. I also recommend a secondary water float switch to prevent water damage to the furnace as well as the house. And a compressor saver for the outside system to help compressor start up which will prolong life as well as drop energy bill. Lastly, I recommend a surge protector to our door system to prevent any damage to electrical components in case of power surges.