Found condensate drain line clogged. Also found magnetic auxiliary line float switch which was full of water had failed and cause condensation to overflow in condensate pan onto hardwood flooring. Clean drain line and coil pan. Added drain treatment and Dawn. Verified with electronic meter buy a continuity test that float switch had failed. Replaced float switch with mechanical float switch. And wired switch to break hot wire from Transformer instead of just the thermostat. Instructed homeowner on how to clean drain line if needed.