Upon arrival for double tune up homeowner showed me to both thermostats and attic access to units I asked homeowner for filters to replace which he mentioned that he had recently replaced them I also asked homeowner for container of bleach or white vinegar which he provided Homeowner mentioned drain line concern and non cooling concern, I let him know I would look into both. I began tune-up indoors, started checking details on both units both were cooling well, checked blower motors both in good condition Checked evaporator could which were in good condition, while checking drain lines I found primary on downstairs to have a little buildup at connection but I was able to clear with my finger. Afterwards both drain lines drained good with no backups. Finally I switched units to heat and checked heating components all in working tolerance Moved to outdoor units where I started with checking safety disconnects on both, both in good condition Removed condenser fans and checked both good C