Hi all, I, um, have some questions. Thanks for any input tl;dr Should a geo heat pump stop running as much (the heat strips then turning on) whenever at the outdoor temp is at or below 35 degrees? I assume the answer to that question is more nuanced than a yes or no. Long version: In August I moved into a home that had a geothermal system installed in 2015. It's a Bosch Greensource SM Series. To my understanding it is vertical. The system has been a nightmare. When closing on the home I was excited about having a house with a geothermal system (with 9 solar panels also on the the roof!). Since then I have had nothing but trouble with it since literally the day I moved in. Here is a rough timelime: 1. late-August, first day after getting the keys, found pooled water at base of unit, not a ton but a few gallons. Called home warranty people. Tech came out and said unit was backed or clogged with algae and vegetation. Cleaned it out, took a Shop-Vac to the area, said it was fixed and left. 2. Next day, more water. Guy came back out and said it was residual water. Seemed that he was correct as I Shop-Vaced the area and the problem did not return. 3. mid-September, unit seemed to be running loudly and not cooling the house. Gave unit visual inspection. There was literal ice growing on the chassis of the unit. Not frost, ice, like icicles growing down the side of the unit. Called same Home Warranty guy. Came out, said the relay had welded its self shut or something and had to be replaced. Came back two days later and replaced it. Ran fine after. 4. mid-January, very cold in KY. Unit seemed to be running loud one day. A day later, didn't hear the heat pump anymore. Cold-ish air coming from the vents in the house. Indoor temp dropped to 66 degrees (we keep it at 69). I suddenly realized I should just call the people who installed it. They came out and said the board was bad. Would order new one. Tech "did something" so we would still get heat in the house in the interim without the GEO running. 5. four days later, whatever tech did to get us heat stopped working. Temp went back down to 66. Different tech came out and said previous tech "wired something wrong". Heat back on, still no board. 6. monthly energy bill comes in the mail. $550 for using more than 5,500 kWh somewhere between 12/26 and 1/26. 3x times more than we've used thus far in the house. 6. next day, heat back down to 66. My wife and I (plus our four-month-old, poor little guy) at this point say, pardon my french, but say "f*** this!". Turn temp in house down to 55 degrees (felt like that anyway) an moved in with some family. 7. three days later board comes in. Tech installs it. Says we are good to go. move back home 8. next day, heat pump out again. temp in house drops to 66. 9. tech comes out and says previous tech forgot to do something with a "diode" and that we should be good now. 10. next day, heat pump off again, temp in house drops to 66. Tech comes out says previous tech forgot to do something with the settings on the board. Said he fixed it. 11. next day (yesterday), heat pump out again, temp drops to 66. tech comes out, says board was never even the problem, some more settings were wrong and the heat pump has been shutting off too early. Sets it to shutoff on only below 35 degrees - which I don't even know what the really means - cleans a compressor or something. Seems to be working now. Anyway, since I've been tracking the energy usage in late-Jan, we've been consuming 100-250 kWh per day. It had been violently cold there for a stretch with the low around 10 and the high in the 20s for several days in a row. But it's above freezing now and we are still consuming well over 100 kWh every day. The company's explanation with all the energy consumption was basically this: the heat pump was shutting off and the aux heat was coming on, and it took them a while to find the problem and fix it. They said heat pumps are really good until 35 degrees outside, after that the aux heat has to kick in and help out. Company has been really cool the whole time, we haven't paid a dollar for any of their service calls or parts. That aux heat cost us hundreds of dollars and never even blew remotely hot air out of the vents, and would never get the house past 66. Is this just the fact of life with a geothermal system? Really expensive bills, and a cold house in Winter and constant problems?