Super tune up performed today on a Lennox straight electric system installed in 2017. All electrical connections are tight with no corrosion. PSC blower motor and 20mdd capacitor are acceptable. Blower wheel and evaporator coil are clean. Heat strips are pulling proper amperage. Compressor and condenser fan motor are acceptable. Refrigerant levels are in range. Evaporator coil is showing heavy corrosion. No leaks detected on the coil. Electrician is set to come out later today customer states that the breaker for the office keeps tripping.