When I turn the thermostat up I hear the draft inducer relay click, but the inducer motor doesn't start immediately like it used to. There's quite a lag time before I hear the draft inducer fan start up, but it will after a while. The motor is a shaded pole, so apparently no faulty capacitor to cause this. My concern is that since the thermostat has kicked the relay, current to a non-turning motor might cause a fire. Any ideas on the cause???