ᐅ Compressor failed after 6 years (Ecoforest ground-source heat pump / well construction by Heth)

If the problem already existed back then, the numbers you mentioned do not indicate how the start cycles are distributed over the operating hours. You assume a linear distribution, but it is also possible that something broke down at a later point. That is exactly why maintenance is performed.
And even if the problem was present from the start and the first technician did not notice it, you still have a good chance that the next technician will catch it.

Not signing a maintenance contract because it’s "too expensive," and then complaining when a defect occurs after 6.5 years—especially when the data clearly suggests that something has been off for quite some time—is a somewhat simplistic way to view the situation.

Bookstar87 schrieb:

Well, let’s not exaggerate. In winter, when it’s below freezing, you won’t have a supply temperature of 23 but rather between 27 and 32 degrees Celsius (80.6 and 89.6°F). And you can definitely feel that the tile is warm. But it’s very comfortable and nothing like the underfloor heating systems in houses from the 1990s.

At -15 degrees Celsius (5°F), our heating curve has a supply temperature of exactly 27 degrees Celsius (80.6°F), and to me, that doesn’t feel “warm.” But I’d be happy to invite you over if I hear again this winter that the floor feels cold and the heating isn’t working at all.

Reggert schrieb:

At -15°C (5°F), the supply temperature on our heating curve is exactly 27°C (81°F), and to me that doesn’t feel "warm," but I’m happy to include you when I hear in winter that the floor feels cold—is the heating working at all? 😉

Alright. Just stick with the normal standard that 95% of people here have. You probably have a passive house or a room temperature of 20°C (68°F). There are even cavemen who don’t have any heating at all.

And if someone thinks that maintenance would somehow improve things, seriously? Usually, the heating technician who did the initial system installation handles the maintenance. And as often happens, they have no clue and the systems cycle to death. Nothing unusual here at all. Anyone signing a maintenance contract for a heat pump either has zero understanding, too much money, or both.

Even though I usually tend to side with the professionals... accusing a layperson of being too clueless and mishandling their heat pump just because they don’t pull and analyze the performance chart every month...

I see it the same way. This should have been noticed by a technician during the first maintenance.

I compare it to a modern start-stop engine. If there’s an issue with the sensors, the engine will stall at every traffic light in winter. The technician immediately thinks, “Oh no, and it’s -5°C (23°F), this must be a fault...”
The layperson, on the other hand, is impressed by the modern technology that apparently has no trouble switching the engine off after only 500 m (0.3 miles) at -5°C (23°F). How would an absolute beginner know that even a modern engine can’t handle this?
School doesn’t teach that engine oil ideally needs to be at 55°C (131°F) before you put the engine under gentle partial load.

Not everyone has studied engineering, learned a technical trade, or has a hobby interest in such things.
You simply can’t expect a layperson to know the optimal activation behavior of their heat pump.

Especially not when even the technician fails to recognize it during maintenance.

By the way, one reason why some people have serious doubts about buying a heat pump is that the operator often has no idea and completely misinterprets it. The installer sets it up incorrectly.
And in the end, they say:
What?? You didn’t read the manual, study thermodynamics for two semesters, and optimize the heat pump over a period of 2-3 months?

Well, then it’s unfortunately your own fault if it breaks down after three years. It’s all written right here, on pages 20-658, and yes, exactly according to the optimization table in Appendix 3B. Excuse me? No, you have to solve the differential equation correctly yourself, we can’t do that for everyone. Yes, the initial values are important too… Tell me, did you sleep through Mathematics IV?

Yes, ideally, heavy machinery like this would come with a 10 or better yet 20-year warranty.

Or the equipment could have improved self-monitoring capabilities.
In the past, car owners had to check the oil level themselves, then sensors were introduced, and now some vehicles don’t even require oil anymore. ;-)