do thermostats go bad over time?
the central a/c doesn't seem to turn on or off fast enough, can changing a capacitor in it change this?
it seems to get stuck on and won't turn off unless the temperature setting is raised 4 or 5 degrees higher than the usual cut off point, seems to be on real hot days it does this
also, who makes the best or a good thermostat, both nonprogrammable and programmable?