So my wife drives the roadster as her daily driver. Last week my wife was driving to work after dropping off my son at school. The roadster threw up a warning "Powertrain problem, Service required" She texted me about while I was at work. A couple of miles later it put up a another warning "System too hot, Vehicle shutting down". At that point the vehicle came to stop and she could not restart the car. After trying to figure out what to do we finally called our insurance roadside service to tow the car to the service center. They worked on it for a day and came up with the diagnosis of "fan cooling duct to power electronics module loose and not allowing full fan air volume to cool module" I figured since the car was in the shop I told them to go ahead and do the annual service (18 months since last service) to make sure nothing else is wrong. I also asked them to change the transmission fluid along with the coolant. Got the car back 3 days ago. I drove it from the service center to my house with no issues. My wife drove it the next two days without any issues. Then today she is driving and the powertrain warning comes up again. Luckily she was close to her destination and was able to make it there. After about an hour she got back into the car and was able to drive home (8 miles) without any issues and no warning. Told her to drive slowly and take back roads. She plugged in the car when she got home. I get home late tonight from work to see the roadster charge port flashing red. Screen had a couple of faults "system too hot, vehicle shutting down" and something else along the lines of system too hot charging time increased. The car had charged about 40 miles in 7 hours on a NEMA 14-50. I hear the coolant motor going so I decided to take a look. I see the coolant running in the container. When I try to get a better look to see how much is in there and it is nearly at the bottom (below the minimum line). So I am not familiar with coolant system but I am guessing that the amount of fluid in the container should be higher despite the pump running, am I correct in assuming this? I had the coolant drained and refilled for my annual service. What I am confused about is that the car was running fine for 3 days before this occurred again. Can the car run fine for a few days despite the coolant being low? Any major damage that could be permanent with all this overheating? Anyone else had this problem? Just for future reference can I fill the coolant container myself? I am obviously calling Tesla in the morning to see what can be done.