This has been an ongoing saga in my condo, and it took three visits from Trotter & Morton over the last two years to finally fix. The thermostat in my condo has never been controllable so the heat has always been on maximum. This has been fun...not really. The one thing I can say about these guys is they have all been really nice and friendly, and for the most part I felt like they knew what they were doing. I just wish they would have figured out the problem sooner. They couldn't seem to figure out what was wrong with my thermostat until the last visit a couple of weeks ago when they finally determined that one of the wires in the floor below me must have gone wonky and that was affecting the control over my thermostat. They have finally given me a portable transformer that will cure the problem once and for all. I'm no longer at the mercy of faulty wires throughout the building..Yay!