Heat Relief Heating & Cooling comes in every six months to make sure my heating and air conditioning systems are working fine. If something isn't, they go ahead and troubleshoot the problem and get it resolved. During their last maintenance visit, the technician noticed a few things that needed to be worked on. He replaced a hard stop, and something I can't think of at the moment. But, he was very knowledgeable and did a good job. I've been using their services now for about three years, and they're always responsive, and ensure the maintenance is done when it's scheduled.