For this job we performed a super tune-up on all three systems. We noted that all three of the units did not have a P-trap on the drain lines or a drain switch. I recommended installing a drain switch on each system and redesigning the drain lines to have a P-trap to bring the systems up to code. Homeowner agreed to have the work done. All components within the refrigerant cycle and heating cycle of the unit were running within normal spec limits at the time of inspection. Thank you for choosing Comfort experts, have a great day!