On arrival, homeowner told me about an issue with first and second floor thermostats going blank and then overnight coming back on. Diagnose clogged drain line for the condensation pump for first and second floor unit. I brought my diagnoses to the customers attention and proceeded with repairs. Replaced condensation tubing and cleaned fitting at drain connection. Completed to system cooling maintenance. Replaced 16 x 25 x 5 filters provided by homeowner. Checked electrical components on indoor and outdoor units, cleared drain lines, treated condensation pump, cleaned outdoor units and checked charge. Systems are currently operating at manufacturer specifications.