My wife and I recently purchased a home with an econar geosource 2000 system installed around 1993. Before purchase, the unit was serviced on June 30th where an expert familiar with the system signed off that it was in working order. He noticed the psi on the system was low (30-40?) and was able to get it back to the recommended psi of 70. Once we started moving into the house a month and a half later, we noticed the system wasn't working. Upon returning to recheck the system he found a transformer wasn't working properly in the unit; however, once a new transformer was put in he found the psi of the system to be at zero regardless of what he did. His theory was that whenever the former owners installed either a new septic or radon mitigation unit, someone must've hit something in the loop field to cause a leak; however, both of the septic and mitigation unit were installed prior to the first service visit. The field loop and septic system are on completely different sides of the property and the mitigation system is inside the house. One of the pumps would slowly drip dirty water when he opened it and it set off his carbon monoxide detector, while the other one was full of clay. We haven't even moved in fully and are looking at what he estimated to be a $40,000 repair, does anyone have any advice as to what to do next? We wouldn't have bought a house with a defective hvac unit, would it be worthwhile to consult a second opinion to find if the serviceman was trying to cover his tracks from something he potentially missed during the initial service call or does his theory seem valid? I have a hard time wrapping my head around the idea of "something has already happened that has made the unit ineffective, but it is signed off in proper working condition." We are in Minnesota and winter is right around the corner, we just spent nearly all of our money on the house and would struggle to replace the entire system with a cheaper, albeit expensive, different system. Any and all advice is appreciated.