I give Siemer Heating & Cooling a five-star rating! I've used others in the past that only deserve a one or zero rating, so I speak from experience. The technician that Siemer sent out the first time was terrific. Unfortunately, I can't remember his name, but I want him to get all the credit. In fact, I only want him to come back in the future. He made a very determined effort to fix our system and I was very pleased. He really paid attention to detail. He was also the guy who came out on our third service call over the span of two years. Both the furnace and air conditioner received his careful work and detailed assessment. I highly recommend Siemer Heating & Cooling and will continue using them!