One system heat maintenance in Lawrenceville, arrived on site checked filter and cleared drain line. Checked electrical connections, amp draw and capacitance. Found system with no secondary water safty switch and static pressure is on the high side, recommend installing overflow water safty switch and a PureAirX media to eleveate static pressure in the system. Also recommend installing surge protection to both pieces of equipment to protect electrical systems. Unit is operating normally at this time.