My thermostat has a dial on it for cycle length, and I've had to play around with the thing to get the heater to start up several times. I don't know if the igniter or the blower starts first, but messing with that dial is no longer making either work. The igniter was replaced at the beginning of this year by the way. So right before it stopped working I heard a lot of noise coming from the blower I suppose. But I have heard it make noise like that before and then stop, but not this time. When I turn the temperature up on the heat like normal I can hear some quiet electric like noise and that is it. It won't do anything else no matter what I do. I should also mention that the safety door switch broke so I just put the 2 ends together with some black tape, and the green like came on with no error code as usual. But while I was doing that I noticed that the wiring that fits into a little connector thing that plugs directly into the furnace ignition control board was coming out of the connector. I bought the same kind of connector and replaced it. Then I plugged the heater back in, turned on the gas and turned thermostat up. Now the green safety light is rapidly flashing which I know means wrong polarity or twinning error, bu I don't know how o fix it. Help me please.