Haley Mechanical does a really terrific job for me, and their employees are fantastic! The last time I used them, my furnace was blowing cold air. I mistakenly thought I had signed up for their annual service, but I guess I just forgot. Anyway, the tech came right out, and he said some gunk had gotten between two contact points and that was what was keeping it from blowing hot air. He quickly cleaned it out, and had my furnace back up and running in no time! He was very nice and very polite, and he thoroughly explained everything to me as he worked. He did not leave any mess behind, and he even tolerated my five-year old! That was impressive! So, I am going to sign up for the yearly maintenance contract, because that would have prevented this problem from happening.