Completed three system furnace maintenance and inspection. I cleaned flame sensors and wiped down furnaces. I tested components and amp draws. I tested air pressure and temp splits. While checking out the garage furnace I noticed there was a water leak so I fixed that for the customer. One of their vents in the basement had fallen apart so I put that back together as well. Per customer request I installed a new thermostat and made sure system is working properly. All three furnaces are operating properly at departure.