Technician arrived on site. Found the E180 error code on the s30. Went into dealer setting and found the outdoor temperature sensor shorted. Went to the condenser and opened up the electrical compartment. Plug for the sensor was not put in all the way. Tightened electrical connections. The sensor will work intermittently now. And it’s not sensing the correct temperature. Will order the sensor from Lennox and have dispatch schedule the return visit.