Yes, he guaranteed it for three months. That was not long enough I am afraid.
He did not charge us anything when we took it to him a few weeks ago. That was when I first noticed the developing issue. The issue is that things like this are not meant to be 'repaired' anymore. They can only be replaced. That will cost us too much.
From what I can see, the issue is a stupid design idea. Add to that the fact that the design (according to my research) does not do well in cold weather. Which is something that the manufacturer should have told people from the beginning. But, expecting a business to be honest about their products is even more stupid, I am afraid.
The problem was and is the fact that taking it to a dealer would have added a few thousand more to the repair. We definitely could not have afforded that. Plus, based on my reading, this may well have happened regardless of who fixed it. So, we did what we could.
Personally, I would love for this practice of 'never let them know the truth' that businesses are constantly using to be removed from legality. But, of course, that would arouse the ire of corporations, who feel that using the phrase 'caveat emptor' once fifty years ago is warning enough.
Lastly, we have already been through the mechanics around here thanks to my old truck. It seems working on anything around here that is more than five years old is impossible. Or way out of reach financially. Or any number of excuses that I got when I tried to get it fixed. So, I do not have that vehicle anymore. Now, we may not have anything. We don't have the resources and the talent to work our way through this crap. Which, given my 'work history' of the last ten years, is not a surprise. The powers that be do not want to lift a finger to help anyone, certainly not someone who is not killing themselves to make some oligarch richer.