I have used R&D Heating & Cooling for six years. I bought heating from them so I go with the general service plan every year. My unit is still under warranty. My heating went down recently so I called them. They had to get a new compressor, which was originally broken. They scheduled a guy and he came and worked all day on it and got everything working. It took a while because the parts, but they got my heat working. R&D responds in a quick and efficient manner. I recommend them.