Is there a correlation between the start of your problem and rain? If so, then how long between your problem arising and charging at 240 Volts? The length of time may have allowed the charge port to have dried out sufficiently to allow charging. Has the problem recurred on the 120 Volt EVSE subsequent to charging at 240 Volts. Do you have access to another EVSE? Please describe the light sequence of the charge indicator light on top of the dash when plugging in the 120 EVSE, as well as the lights on the EVSE itself.