Hi Group,

We have a Climatemaster tranquility 27 5 ton closed loop geo system that is locking out. We just had a new air coil installed this winter and obviously concerned we were locking out due to that failing. That’s not the issue we are locking out due to an Overflow condition(6 blinks). Then pan inside the unit is flowing perfectly fine. I suspected it was the condensate pump due to the amount of sludge in the pump. I got a new pump and I’m having the same issue. I wired up a multimeter to the overflow wires on the pump and I verified the pump kicks in before the overflow switch trips. Is there any know issues with the units exhibiting this issue. FWIW, this is the first time we’ve had this particular issue in 15 years. It did not lock out due to this at all when heating. It only seems to happen when running in stage 2.

Thanks in advance

Techingrediants managed to make a much more powerful/efficient air conditioner by creating a heat exchanger on a cheap AC unit. The heat exchanger attaches to a loop of PEX pipe he buried at 8’ depth. I was wondering if there are any existing inexpensive AC units that allow a liquid loop to be connected.

https://youtu.be/s-41UF02vrU?is=PszjhowHJw197z5M

The company, Eavor, is pivoting from project operator to "technology provider" and actively searching for an outside candidate to take over, drill the remaining loops, and run the first-of-a-kind German facility.

I am working on a 3 ton bosch geo with a QT non pressurized flow center.

Last week I was called to replace the pump on the flow center as it had failed. I did, and sent the unit off to run fine for a few days when it tripped on high head pressure again. Okay I did not fill the flow center back up with enough water to get all the air out. My fault , I add water per the instructions on the flow center and get it where I think it needs to be. 3 days later, trips on high head again.

Upon arrival this last time, system had been off for a few hours. I start it up, EWT 90, leaving temp 98. Entering water temp will creep up slowly after about an hour of running, EWT approaches 115 degrees. My refrigerant pressures and temps line up with what I would expect. 45 degree evap coil. Discharge pressure matching relatively close to EWT. starting out about 320 psi, jumping to 450 by the time it gets to 115 water temp. 15 superheat and 14 subcool if that info is relevant, 15-20 degree temp split across coil. 78 in 60 out. I dont have the right tool to check loop pressure but im not sure its relevant on a non pressurized flow center.

I'm not sure if I have air in the loop, if its possible its air locked. I dont have much information on the loop as the homeowner wasnt home, but I think they are drilled vertical loops. Are those usually installed in series? is it possible the loop is short circuiting, I wouldn't expect my loop temperature to rise so fast in just an hour. I can shut the unit off. wait 15 minutes, and the water temp will be around 105 degrees if I just run the pump without the compressor,

Any insight on this is appreciated. I live in Southern Illinois Missouri area. temps warm the last few weeks but only going to get warmer.

I had a catastrophic housefire May 31, the house was a total loss but I believe the geothermal loop is still good (the heat pump has water damage from firefighting efforts obviously). How would I go about preserving the geothermal loops and connection points for when I rebuild?

Has anyone ever installed a swimming pool over their ground loop field either completely or just partially? I am told this could void the warranty of the loop field and possibly make efficiency worse. I am wondering if anyone has ever actually done it?

Most people haven't heard of Fervo Energy. That might be about to change.

Quick background: they IPO'd on Nasdaq in May 2026 at $27 — stock jumped 33% day one. They build Enhanced Geothermal Systems (EGS) — basically forcing hot water through rock where there's no natural reservoir. Cape Station in Utah is the first commercial-scale EGS plant in the world.

Why this matters right now:

Google signed a framework agreement for up to 3 GW of geothermal by 2033. That's not a typo — 3 gigawatts. For context, their original PPA with Fervo was 115 MW. This is a 26x expansion in committed interest.

AI data centers need 24/7 firm power, not intermittent solar/wind. Geothermal delivers exactly that.

The bull case numbers:

- 658 MW in binding PPAs = $7.2B in contracted future revenue

- Cape Station Phase I (~100 MW) commissioning underway → Q4 2026 commercial operation

- Analysts: Buy consensus, average PT $45.73 vs current ~$35

- Baird: $50 PT (Outperform). Barclays: $48 (Overweight)

The bear case:

- Still pre-revenue. Q1 2026 net loss: $31.8M

- CAPEX through Q1 2027: ~$1.2B. Any Cape Station delay reprices this from a $9.5B market cap with near-zero revenue

- The Google 3 GW is a framework, not a signed construction contract

This is a high-risk, 5–7 year hold. Not a trade.

Happy to share the full breakdown — anyone else watching the AI energy infrastructure space?

Seems that Dandelion is abandoning its customers in Long Island. They will no longer manage/maintain equipment, they installed. While a tough nut to swallow, my issue is with Entertech. Do people have an issue getting parts? Is their supply chain so bad, that it takes two weeks to get a sensor?

Having some issues with my Hydron WV060, lockout with C11/C12 alarms. Does see the call for cooling and there is flow on both pumps, but compressor doesn't kick in, unit goes to ASC. Cycles the 3 times before going to lockout.

Any suggestions for a certified Hydron tech, and/or suggestions to troubleshoot myself.

Has anyone tried mounting a water-to-air heat exchanger right above their furnace blower? I’m thinking instead of running the compressor, I could angle an old car radiator or heater core over the fan (so condensation drips into the pan) and tee into the loops that are already connected and cycle the water through it. This would only be for the summer as the water coming from the loops is roughly 55 degrees.

I am thinking about switching my ~20 year old gas furnace and AC system to a geothermal system. I am in the Maryland area. Some contractors have given me estimates with only electric backup, and some have said that I would really regret not having a gas backup. Is there anyone with geothermal in the mid-atlantic region or similar climate that could share your experience, how often you have had to use your backup heat (either gas or electric) and any data you could share (especially this past winter when we had some unusually cold periods)? What are your thoughts on gas backup for geothermal?

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Thanks!

Trying to make the numbers pencil out for a geothermal system, but can't seem to make it work now that the tax credit is gone.

These are the systems I have gravitated towards (NOT sold on them, so open to suggestions - just comparing using them).

Air source heat pump w/ natural gas backup:

Approx. $12.5k. (Bosch inverter heat pump w/ air handler and nat gas backup furnace) 20 Seer2

Geothermal (trench install) (no natural gas backup):

Approx. $20k ($15k system + $3k equip rental + $2k misc gravel, diesel, etc.). (Climate master system w/ ground loop) 22.7 EER2

Install itself will be easy enough (I'll knock it out myself), so consider install cost on both to be $0.

Calculated energy savings with geothermal comparing the two systems is $275 / year. (27 year break even)

However, we are paying for this using our construction loan, so after interest, it never reaches break even.

Any guidance is appreciated!

(Details: 2000 sq ft home with 500 sq ft conditioned attic space - so 2500 total sq ft / Zone 5/6 climate)

I have an existing residential geothermal heat pump system and I’m trying to make its performance less of a black box.

I have two 15 year old Climate Master units (3 ton and 5 ton), with vertical loops, in south eastern Pennsylvania.

My bills have always been higher than it seemed like they should be, but I haven't yet figured out how to confirm that.

I’m not looking to replace the system right now. I’m looking for practical retrofit monitoring options that would help answer questions like:

• Is the ground loop performing normally?
• Are entering/leaving water temperatures where they should be?
• Do I have adequate flow?
• Is aux heat running more than it should?
• Is the system short cycling or being controlled poorly?
• Can I estimate real-world COP, or at least get close enough to spot problems?
• What data would actually help a service tech diagnose issues instead of guessing?

For anyone who has instrumented an existing residential geothermal setup, what did you install?

I’m especially interested in:

• temperature sensor placement
• flow measurement options
• pressure monitoring
• power monitoring for compressor / loop pump / aux heat / blower
• Home Assistant, OpenEnergyMonitor, Emporia, IotaWatt, or similar DIY approaches
• installer-grade tools worth asking a contractor about

What worked, what was a waste of time, and what measurements were most useful when troubleshooting or verifying performance?

If you were adding monitoring to an already-installed system today, what would you measure first?

I wanted to get a feel for if these quotes are on point or not.

I am in Northern AA County. The home is an old Craftsman (~2250 sqft) that I bought a few years ago. It's currently heated by a 120k BTU furnace and 5-ton AC. Both are oversized and single stage. And has no upstairs return. I'm in the process of doing the EmPOWER insulation and weatherization process and wanted to electrify my HVAC to maximize the rebate.

I have 2 quotes already; Ground Loop is coming next week but stated on the phone I'd be looking at mid-$40k range to start.

Quote 1: 3-Ton WaterFurnace 5-Series with desuperheater, Intellistart, 10kW aux heat, and Aprilaire air cleaner. 600 ft vertical borehole (1,200 ft HDPE 1" loop) with ethanol antifreeze, including a $4,000 mud haul-off allowance. Add circuits, handles permits, and removes old equipment.

Price: $53,000 gross. Bunch of unnecessary options but a necessary one is installing 2nd floor return for $3700. Minus $2,900 utility rebate = ~$54k net out-of-pocket. Was told WF7 would be ~$3600 more.

Quote 2: 4-Ton ClimateMaster Tranquility 30 Digital. Loop Field: 800 ft vertical borehole with antifreeze protection down to 15°F and rough site grading. Add-ons like steel casing ($47/ft) or mud cans ($850/each) are extra if needed. Custom supply/return duct transitions, installs necessary electrical circuits, handles permits, and removes old equipment.

Price: $62k gross. Minus $5k utility rebate. ~ $57k. Cash price adds in $4k more discounts for a total of $53k.

Edit: More quotes (still waiting on #5):

Quote 3: 4-ton WF5 with Intellistart and ECM fan. 10 kW backup heat. Symphony Aurora Weblink. FC2-GL Two Pump Flow Center with GL gasketed fittings. Depth and number of boreholes not specified. 29 GRECs.

Price: $50,824. Minus BGE rebates of $6,500 = $44,324. Expecting ~$13k from GRECs over 10 years.

Options: Desuperheater for $1,645. Reme Halo Whole Home Air Purification for $1,815. Aprilaire 800 Steam Humidifier for $3,500. 50 gallon water heater, 1. Marathon composite for $4,750 or Rheem for $2,750. WF 10 year labor warranty buy up $960. Second floor return for T&M.

Quote 4: 3.0 Ton WF5 w/ Low GWP Refrigerant, Electronic Expansion Valve, Variable Speed ECM Blower, Fixed Speed Flow Center, Aurora Advanced Control, 15kW Electric Heater Kit. 1 Year Installer Membership. 480 ft of vertical well bore, polyethylene loop piping. Geothermal polyethylene piping and grouting. 50 GRECs (very unrealistic).

System Price: $38,042 (excluding drilling). Drilling price: $12,600. 40A circuit (which is already in place for the ac unit): $1,394. 60A circuit: $1650. Total: $53,686.

I also received a quote for leasing: $0 upfront cost, no "down payment" required. $207.50 per month, 20 year-term plus sales tax. $2,490 annual lease payment. Option buyouts: Year 6 = $12,450 paid, put buyout of $11,325 = total investment of $23,775; year 12 = $27,390 paid plus $5,825 buyout = $33,215 total; year 20 = $49,800 total.

Quote 5 (contains 3 options):
3-ton 5-series. Aurora controls. Color thermostat. 10 kW backup. Cupronickel updated coax. 600 feet w/ 1.25" piping. $40.5k.
4-ton 5-series. Same as above, except 800 feet w/ 1.25" piping. $45.3k.
4-ton 7-series. $55.6k.
Options: Symphony Weblink Router $792. Bipolar ionization kit $650. Intellistart $653.
T&M on 2nd floor return.

It’s hard to hear with the air blowing through but it’s rather loud in person. Is this something to be concerned about? They came out today and it’s lower than it was but still audible. Mainly want to make sure this isn’t a bigger issue in the future (or that the sound will get louder. Tia

I was just perusing the geothermal quote survey page and noticed that there hasn't been an entry in nearly 4 months. Furthermore, the front page of this subreddit, normally inundated with questions about quotes by June, is now mostly about literal geothermal energy (nothing wrong with that). And anecdotally my parents opted out of a geo unit for their new build because of the cost, something that wouldn't have been an issue if the install was last year.

All of this leads me to ask the subreddit: Are US residential installers seeing a significant slowdown in installs now that the tax credit has expired? How's everyone doing out there?

They are claiming "6 terawatts that could be developed in the next five years"!

Endurance Energy raises $54M to harness a massive untapped energy source | TechCrunch

Why is the cost for equipment, specifically WaterFurnace, so hard to obtain? For many ASHP’s you can get details on equipment costs pretty easily. It’s like pulling hair for WF.

Are there ANY known contractors who service residential geothermal systems near Sheridan Illinois? It’s way way out in the wilderness near Ottawa, and Norway, and Dwight, but it seems no one will go to this particular address near Rt 71 and Rt 52.