Deb, Due to the below component I wouldn't power up your systems at the service panel. I recommend calling in a standard HVAC person to replace that temperature control switch. It's not what I would consider a geothermal device so you don't need a high dollar technician to replace the part. Anytime I invite someone to do a job for me which is rare, I always buy the materials so I get the best materials and pay for the workmanship only. You can get the model number and manufacturer from the component then buy the replacement component on ebay for a fair price or better. After that part is replaced I wouldn't expect any breaker to trip when closed, so you could power up components and determine if those components are working properly. Your Geothermal has protective trips which typically read out by a flashing LED that can be interpreted by using a Table in your Geothermal owners manual. If you are getting a trip this would help you determine what is causing it. I'll review the manuals for your Geothermal and HVAC Units to refresh my memory on what you have so I can help you after the Tank Temperature Control/bimetallic operated device is replaced. Let me know if you have questions. Don't forget to monitor your Son for proper healing & problems he could be having while out of sight at the dorm. My Son was in a dorm when his diabetes started. It was luck only that saved his life, he should have been in a coma according to the Emergency Room doctor. When he put the phone down to go pee while I was talking to him on the phone & he was telling me he didn't feel good, I called and had an Ambulance pick him up and take him to the hospital. 2nd chances don't always happen. "That melted component, Picture IMG_1820.jpg is the Buffer Tank Temperature Control switch. I took a close look and can see it is mounted on the tank and has temperature settings marked inside. It reminds me of a hot water tank temperature control switch when viewed up close. I'm assuming the switch normally controls one of the Geothermal Units, turning it on & off at the thermostat input on the CXM Control Card I mentioned today."