They do try
After initial installation last summer, service had to come back five times. I’m still not sure it’s right because winter set in and I stopped using my air conditioner. However, I still have a transformer buzz that occurs occasionally when the furnace runs. No one can find out what that problem is either so they just gave up. I’m hopeful that my air conditioner will pull water out in the summer and work well. If not, I hope its warranty will eventually cover all repairs. I have to say that I am quite disappointed in the carrier product and I wouldn’t recommend it