Upon turning on my heater for the first time this season I found it didn't work. I called J & M because they have been in business in our valley for thirty years. Richard was the technician that they sent out for my appointment. He was pleasant, knowledgeable and thorough. Richard listened to what I told him about my experience with the heater then went to the unit to check it out. He explained to me how the components worked and what he had done . I had him replace the thermostat that was installed by the builder to a model that had a bigger screen and was lighted. We talked about the different types that he carried in his vehicle and settled on the new one. Richard did a couple of checks with the thermostat to make sure it worked for the heater and air conditioner before he removed his ladder and tool bag from my house. After Richard left except for the heater purring away and blowing warm air you would never have known that he was here. Not a speck of dust or insulation from the attic I will be scheduling a Tune up appointment with J & M for my air conditioner in the near future. Thank you Richard and J & M Heating and Air!