We have an annual contract with Reliance to service our furnace. We used to have one with another provider, but Reliance was way cheaper. They have always been prompt and efficient with the annual maintenance. Recently, we had a problem. The furnace was functioning, but it was acting up and the outside temp was close to zero.
Reliance's bad: I was told the repair tech would be by the next afternoon. Yikes, we could be frozen by then if the furnace packed it in (Reliance latter apologised, saying that that should not have happened). I called another company that came right away. He figured that it was the board, but did not have any and, as our model has been out of production for 10 to 15 years, he said that they would be hard to find.
The next day, the Reliance Tech showed up, agreed that it could be the board, of which he had TWO in his truck! This seemed to fix the furnace, but we decided to replace it as part would be hard to find and it still sounded a little wonky.
We had Reliance and another provider quote. The sales rep was great and she had the lower price, but we decided to go with another provider as we could purchase through Costco and get mega Costco $. But Reliance was great. Would recommend them.