My father had similar issues with his new boiler although in his case after constant failed repair attempts his local place finally hired some guy who knew what he was doing.
There's also rebates on heatpumps around here but local forums seem to suggest that the installers are super backed up and quote "go away" prices. You can't get the rebate unless you go with a state approved installer, so even if you can install it yourself you're out of luck. Seems like they've just raised their prices to compensate for the rebate since they already had to much work.
Not sure the trouble is over. You are only good until you need servicing, and then you need to shop around again. Servicing is even worse, because it is an acute problem and you are under so much time pressure to solve the issue.
Sometimes even the company that sold the unit does not honor their warranty. They shut down. They re-incorporate under a new company, etc.
For a similar reason, heat pump water heaters tend to have a larger storage tank, as they take longer to heat the water and you want more of a usage buffer.
Why do you even respond if you don't know enough about heat pumps?
But do go on about how I don't know enough.
Modern heat pumps do fine well below 0 degrees Celsius. Here's one that's great to -15 C and okay down to -25 C[0]. If you search cold-climate heat pumps, you'll find plenty of information about how modern heat pumps are fine in most the temperatures you'll find in most of the US (including up north).
(I have heard that a lot of them are still only available in Europe, but you can definitely find some in the US.)
"Below 0° Fahrenheit, heat pumps can still heat your home with more than twice the efficiency of gas heating or standard electric heating (such as electric furnaces and baseboard heaters). They’ve been tested and approved as far north as the Arctic Circle, and are popular options in very cold countries like Finland and Norway."
Finland has over 60% heat pumps.
And heat pumps, just to be clear, work by generating a temp difference. The main problem is the efficiency and that drops also because there is a heating cycle needed for the air intake.
How many models did you actually research yourself?
So his point still stands.
It also appears that the tech for the more typical air source heat pumps has improved significantly in recent years which makes it more viable for colder climates
If above ground ranges from 0-100 degrees F, underground likely ranges from like 64-68 degrees F, which makes it really energetically "cheap" to get to your preferred temperature range, heating to idk 70 at most and cooling to probably not even 65.
The HVAC contractors here are pretty small, maybe they do not want to take the risk.
As someone else said, if I had more time, I would have purchased a few DIY split systems... I might do that for AC only, as I did not replace the AC at that time.
Or they're so busy they can pick and choose their jobs. I had a quote to replace a 12 foot section of pipe come in at $700, not even two hours worth of work.