I did not have a good experience with Opie's One Hour Heating and Air. The tech came out and took a look at the flame in my furnace and he said that he could tell just by looking at the flame that the heat exchanger had a crack in it. The part was under warranty so it would be free, but the labor to repair it was going to be $1,500. I paid $149 for this diagnosis. He was not sure when the part would be available, and he was supposed to call me back this morning. But, they never called me back. Likewise, they were going to send me a written estimate by email. I never got that either. I ended up calling another company today and they can fix it for $500, and since I have not heard back from Opie's, I guess I will go with the other company. It is supposed to be super-cold tomorrow, and I need my furnace. I basically paid $149 for somebody to look at the flame in my furnace.