I called 2 companies, The first company came out with a \""pricing on the fly\"" model. They pushed purchasing a new unit and gave me a quote of about 1200 dollars and said they didn't have all the parts and that it may be worse if they find other problems. I paid the 79 dollar diagnostic and called One Hour. The guy showed up on time and had all of the parts. His price was about $400 less and they had all the pricing preprinted and defined. Here is why I gave them 5 stars. The tech accidentally fried my thermostat. We didn't notice till later when we figured out the unit wasn't shutting off. They sent someone out the next day and made it right. That is a critical piece. When something unexpected goes wrong (as it does from time to time), a good company will make it right. These guys made it right.