For a long time I couldn’t get our heating system to turn on, and i kept messing around with it. I was decreasing air filters, vacuuming inside of it & still I had to manually get down & turn on the heater. In order to turn it off, I had to by hand turn off the switch. It was frustrating & I wondered if something was wrong, perhaps the thermostat is not working correctly. I checked to make sure I didn’t destruction it since I didn’t want to be embarrassed when I called the Heating & A/C business. I was anyway, the guy came over & looked over our unit & thermostat, then he did some calibrating, lubrication & tightening of all loose parts. There wasn’t anything major warong. The thermostat was in tip top shape too. What was the problem? Finally the Heating & A/C business talked to myself and others about what the issue was exactly. My problem was that I couldn’t remote control turn on the thermostat. He then asked to see the remote & I knew instantly it wasn’t going to be good, then so the thermostat remote was out of batteries, not the actual thermostat, then no wonder the remote couldn’t turn on the machine! My thermostat is just a digital display that lights up. It is built right into the heating machine. I can’t believe I called the guy all the way to our condo to change some batteries, however at least the heating system got some love & care in the process. It wasn’t a totally wasted trip then.