Hey guys, need some help deciding the best option here. Bought a house in august with a geothermal open loop system. Approx 17 yrs old. In summer the ac was great except there was water on floor around unit. Tech could not find leak. Said I needed to install $800 with of plumbing and test valves for him to properly check the system. Then comes heating season. My electric bill went from around 115 to 300 a month. It's not even cold yet! Aux heat comes on randomly throught the day even when outside temps are 30deg. Contacted a local geo company aztech geothermal. The guy gave me a quote and told me the system should not be going into aux. Also said the old waterfurnace units had a life range of around 15yrs. So already on borrowed time at 17? Anyways he guesstimate service call would be around 500-600$. If I do service call then decide on new unit they will not charge me for the service just bill it as an initial estimate or something like that. House is around 1300sq ft with tons of windows. And the basement is heated as well do not think that's included in the sqft. His quote included a 3ton 5 series water furnace. With options to upgrade to a 7. Is the 7 a good upgrade? Says it is 20% more efficient. I also want to add a desuper heater and holding tank. So basically with 7 series and desuper heater it would be around 18k after rebates. Is this a good price? Or should I just try and have my old unit fixed? 2019 last year for 30% fed tax rebate. Really making me think about new unit. Included pdf quote he sent me for more info.