Heating Maintenance Performed Upon arrival system is working and operational. I began my maintenance at the furnace unit, I checked and tightened electrical connections. I inspected the heating components for proper operation and wear. Burners were inspected for proper operation. Flame sensor was cleaned. Condensates lines were inspected for proper drainage. Static pressures and temperature splits were taken. Filter has been checked, does not need to be changed at this time. Blower housing and wheel was inspected for balance and dust build up. Air supply was measured. Inspected safety switches as well as inspected home for fire and carbon monoxide detectors. Upon inspection of both units I found there to be no form of electrical protection found on either, recommend adding surge protection to both units to protect the sensitive electrical components contained within the system. Upon departure system is working and operational.